Common Weakness Enumeration
CWE-1333
AllowedInefficient Regular Expression Complexity
Abstraction: Base · Status: Draft
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
816 vulnerabilities reference this CWE, most recent first.
CVE-2026-92599 (GCVE-0-2026-92599)
Vulnerability from cvelistv5 – Published: 2026-09-16 21:47 – Updated: 2026-09-16 21:47
VLAI
EPSS
VEX
Title
Joi before 17.13.7 and 18.2.6 ReDoS via isoDate
Summary
joi (npm package `joi`, hapi.js) versions >=17.2.0 <17.13.7 and >=18.0.0 <18.2.6 are vulnerable to regular expression denial of service in the `Joi.string().isoDate()` validation rule. One of the regular expressions the rule applies to the input is unanchored, so a valid ISO date followed by a long run of fractional-second digits causes the regex engine to restart its search from every position in the string, yielding time proportional to the square of the input length (about 1.4 s for 64 KB of digits and about 22 s for 256 KB). A remote attacker who can supply a string to an isoDate validation can stall the application with a single request. Fixed in 17.13.7 and 18.2.6; as a workaround, cap the length of the string before it reaches joi.
Severity
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/hapijs/joi/security/advisories… | vendor-advisory |
| https://www.vulncheck.com/advisories/joi-before-1… | third-party-advisory |
Impacted products
Date Public
2026-09-02 00:00
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/joi",
"product": "joi",
"vendor": "hapijs",
"versions": [
{
"lessThan": "17.13.7",
"status": "affected",
"version": "17.2.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "17.13.7",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/joi",
"product": "joi",
"vendor": "hapijs",
"versions": [
{
"lessThan": "18.2.6",
"status": "affected",
"version": "18.0.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "18.2.6",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "qrn12580"
},
{
"lang": "en",
"type": "finder",
"value": "yfwmaniish"
}
],
"datePublic": "2026-09-02T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "joi (npm package `joi`, hapi.js) versions \u003e=17.2.0 \u003c17.13.7 and \u003e=18.0.0 \u003c18.2.6 are vulnerable to regular expression denial of service in the `Joi.string().isoDate()` validation rule. One of the regular expressions the rule applies to the input is unanchored, so a valid ISO date followed by a long run of fractional-second digits causes the regex engine to restart its search from every position in the string, yielding time proportional to the square of the input length (about 1.4 s for 64 KB of digits and about 22 s for 256 KB). A remote attacker who can supply a string to an isoDate validation can stall the application with a single request. Fixed in 17.13.7 and 18.2.6; as a workaround, cap the length of the string before it reaches joi."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T21:47:03.073Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-6h2x-m376-mqjq)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/hapijs/joi/security/advisories/GHSA-6h2x-m376-mqjq"
},
{
"name": "VulnCheck Advisory: Joi before 17.13.7 and 18.2.6 ReDoS via isoDate",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/joi-before-17.13.7-and-18.2.6-redos-via-isodate"
}
],
"title": "Joi before 17.13.7 and 18.2.6 ReDoS via isoDate",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-92599",
"datePublished": "2026-09-16T21:47:03.073Z",
"dateReserved": "2026-09-16T13:48:49.970Z",
"dateUpdated": "2026-09-16T21:47:03.073Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-92114 (GCVE-0-2026-92114)
Vulnerability from cvelistv5 – Published: 2026-09-15 21:30 – Updated: 2026-09-16 19:13
VLAI
EPSS
VEX
Title
a2ui-project a2ui Basic Catalog safe_regex.ts redos
Summary
A vulnerability was identified in a2ui-project a2ui up to 0.10.6. Affected is an unknown function of the file renderers/web_core/src/v0_9/basic_catalog/functions/safe_regex.ts of the component Basic Catalog. Such manipulation leads to inefficient regular expression complexity. The attack can be launched remotely.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-16 19:13 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/404283 | vdb-entry |
| https://vuldb.com/vuln/404283/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-92114 | third-party-advisory |
| https://vuldb.com/submit/934085 | third-party-advisory |
| https://github.com/a2ui-project/a2ui/issues/2292 | issue-tracking |
| https://github.com/a2ui-project/a2ui/pull/2366 | issue-trackingpatch |
| https://github.com/a2ui-project/a2ui/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| a2ui-project | a2ui |
Affected:
0.10.0
Affected: 0.10.1 Affected: 0.10.2 Affected: 0.10.3 Affected: 0.10.4 Affected: 0.10.5 Affected: 0.10.6 cpe:2.3:a:a2ui-project:a2ui:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-92114",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-16T19:13:12.763135Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T19:13:23.487Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:a2ui-project:a2ui:*:*:*:*:*:*:*:*"
],
"modules": [
"Basic Catalog"
],
"product": "a2ui",
"vendor": "a2ui-project",
"versions": [
{
"status": "affected",
"version": "0.10.0"
},
{
"status": "affected",
"version": "0.10.1"
},
{
"status": "affected",
"version": "0.10.2"
},
{
"status": "affected",
"version": "0.10.3"
},
{
"status": "affected",
"version": "0.10.4"
},
{
"status": "affected",
"version": "0.10.5"
},
{
"status": "affected",
"version": "0.10.6"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "colorfullbz (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was identified in a2ui-project a2ui up to 0.10.6. Affected is an unknown function of the file renderers/web_core/src/v0_9/basic_catalog/functions/safe_regex.ts of the component Basic Catalog. Such manipulation leads to inefficient regular expression complexity. The attack can be launched remotely."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 5,
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T21:30:19.468Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-404283 | a2ui-project a2ui Basic Catalog safe_regex.ts redos",
"tags": [
"vdb-entry"
],
"url": "https://vuldb.com/vuln/404283"
},
{
"name": "VDB-404283 | CTI Indicators (IOB, IOC, TTP, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/404283/cti"
},
{
"name": "CVE-2026-92114 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-92114"
},
{
"name": "Submit #934085 | a2ui-project a2ui 0.10.6 CWE-1333",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/934085"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/a2ui-project/a2ui/issues/2292"
},
{
"tags": [
"issue-tracking",
"patch"
],
"url": "https://github.com/a2ui-project/a2ui/pull/2366"
},
{
"tags": [
"product"
],
"url": "https://github.com/a2ui-project/a2ui/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-09-15T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-09-15T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-09-15T17:41:00.000Z",
"value": "VulDB entry last update"
}
],
"title": "a2ui-project a2ui Basic Catalog safe_regex.ts redos",
"x_generator": [
"VulDB PVTS v202609"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-92114",
"datePublished": "2026-09-15T21:30:19.468Z",
"dateReserved": "2026-09-15T15:35:54.705Z",
"dateUpdated": "2026-09-16T19:13:23.487Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-87819 (GCVE-0-2026-87819)
Vulnerability from cvelistv5 – Published: 2026-09-09 11:21 – Updated: 2026-09-09 11:21
VLAI
EPSS
VEX
Title
GitPython before 3.1.60 Denial of Service via ReDoS
Summary
GitPython before 3.1.60 contains a regular expression denial of service vulnerability in Actor.name_email_regex that processes commit author and committer fields. Attackers can craft a commit object with a malformed author field containing an unterminated angle bracket to cause quadratic backtracking, exhausting CPU resources for over two minutes per commit access.
Severity
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gitpython-developers/GitPython… | vendor-advisory |
| https://www.vulncheck.com/advisories/gitpython-be… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| gitpython-developers | GitPython |
Affected:
0 , < 3.1.60
(semver)
Unaffected: 3.1.60 (semver) cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:*:*:* |
Date Public
2026-08-26 00:00
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:pypi/GitPython",
"product": "GitPython",
"vendor": "gitpython-developers",
"versions": [
{
"lessThan": "3.1.60",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.1.60",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.1.60",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "prvazsahnazarov"
},
{
"lang": "en",
"type": "reporter",
"value": "manus-use"
}
],
"datePublic": "2026-08-26T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "GitPython before 3.1.60 contains a regular expression denial of service vulnerability in Actor.name_email_regex that processes commit author and committer fields. Attackers can craft a commit object with a malformed author field containing an unterminated angle bracket to cause quadratic backtracking, exhausting CPU resources for over two minutes per commit access."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-09T11:21:05.360Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-g5vv-9gxw-82hx)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-g5vv-9gxw-82hx"
},
{
"name": "VulnCheck Advisory: GitPython before 3.1.60 Denial of Service via ReDoS",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/gitpython-before-3.1.60-denial-of-service-via-redos"
}
],
"title": "GitPython before 3.1.60 Denial of Service via ReDoS",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-87819",
"datePublished": "2026-09-09T11:21:05.360Z",
"dateReserved": "2026-09-09T10:32:34.110Z",
"dateUpdated": "2026-09-09T11:21:05.360Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-86081 (GCVE-0-2026-86081)
Vulnerability from cvelistv5 – Published: 2026-09-08 21:24 – Updated: 2026-09-09 13:45
VLAI
EPSS
VEX
Title
n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path
Summary
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8N_BLOCK_FILE_PATTERNS regular expression. The pattern ^(./).git(/.)$ allowed catastrophic backtracking and ran synchronously in the main n8n process. An authenticated workflow editor could therefore freeze the instance with one workflow execution; the affected default is declared in packages/@n8n/config/src/configs/security.config.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 13:45 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories… | x_refsource_CONFIRM |
| https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76 | x_refsource_MISC |
| https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 | x_refsource_MISC |
| https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-86081",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-09T13:45:20.437735Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-09T13:45:42.273Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "n8n",
"vendor": "n8n-io",
"versions": [
{
"status": "affected",
"version": "\u003e= 2.38.0, \u003c 2.38.2"
},
{
"status": "affected",
"version": "\u003e= 2.0.0, \u003c 2.37.7"
},
{
"status": "affected",
"version": "\u003c 1.123.76"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8N_BLOCK_FILE_PATTERNS regular expression. The pattern ^(./).git(/.)$ allowed catastrophic backtracking and ran synchronously in the main n8n process. An authenticated workflow editor could therefore freeze the instance with one workflow execution; the affected default is declared in packages/@n8n/config/src/configs/security.config.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "CWE-1333: Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-08T21:24:20.936Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/n8n-io/n8n/security/advisories/GHSA-j535-v25q-vx3q",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-j535-v25q-vx3q"
},
{
"name": "https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76"
},
{
"name": "https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7"
},
{
"name": "https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2"
}
],
"source": {
"advisory": "GHSA-j535-v25q-vx3q",
"discovery": "UNKNOWN"
},
"title": "n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-86081",
"datePublished": "2026-09-08T21:24:20.936Z",
"dateReserved": "2026-09-04T19:34:03.100Z",
"dateUpdated": "2026-09-09T13:45:42.273Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-85062 (GCVE-0-2026-85062)
Vulnerability from cvelistv5 – Published: 2026-09-03 20:30 – Updated: 2026-09-09 17:45
VLAI
EPSS
VEX
Title
Colord: Slow rejection of oversized malformed color strings
Summary
Colord is a tiny yet powerful tool for high-performance color manipulations and conversions. Prior to 2.9.4, synchronous CSS color string matchers in src/colorModels/rgbString.ts, src/colorModels/hslString.ts, src/colorModels/hwbString.ts, src/colorModels/lchString.ts, and src/colorModels/cmykString.ts use the ambiguous numeric regular expression ([+-]?\d*.?\d+), allowing the same digits to be divided between overlapping quantifiers in quadratically many ways when malformed input is rejected. An attacker who can supply an unbounded color string to colord(), getFormat(), isEqual(), mix(), or contrast(), including through a request body, JSON field, or uploaded stylesheet, can block the processing thread with a multi-kilobyte payload. The affected matchers are parseRgbaString, parseHslaString, parseHwbaString, parseLchaString, and parseCmykaString. This issue is fixed in version 2.9.4.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 17:45 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/omgovich/colord/security/advis… | x_refsource_CONFIRM |
| https://github.com/omgovich/colord/pull/141 | x_refsource_MISC |
| https://github.com/omgovich/colord/commit/8701808… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-85062",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-09T17:45:49.335799Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-09T17:45:56.584Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "colord",
"vendor": "omgovich",
"versions": [
{
"status": "affected",
"version": "\u003c 2.9.4"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Colord is a tiny yet powerful tool for high-performance color manipulations and conversions. Prior to 2.9.4, synchronous CSS color string matchers in src/colorModels/rgbString.ts, src/colorModels/hslString.ts, src/colorModels/hwbString.ts, src/colorModels/lchString.ts, and src/colorModels/cmykString.ts use the ambiguous numeric regular expression ([+-]?\\d*.?\\d+), allowing the same digits to be divided between overlapping quantifiers in quadratically many ways when malformed input is rejected. An attacker who can supply an unbounded color string to colord(), getFormat(), isEqual(), mix(), or contrast(), including through a request body, JSON field, or uploaded stylesheet, can block the processing thread with a multi-kilobyte payload. The affected matchers are parseRgbaString, parseHslaString, parseHwbaString, parseLchaString, and parseCmykaString. This issue is fixed in version 2.9.4."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "CWE-1333: Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-03T20:30:12.768Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/omgovich/colord/security/advisories/GHSA-2wm5-q62r-hmrv",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/omgovich/colord/security/advisories/GHSA-2wm5-q62r-hmrv"
},
{
"name": "https://github.com/omgovich/colord/pull/141",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/omgovich/colord/pull/141"
},
{
"name": "https://github.com/omgovich/colord/commit/87018089515ed66a85b1a95c3c7c3fd69a25bac2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/omgovich/colord/commit/87018089515ed66a85b1a95c3c7c3fd69a25bac2"
}
],
"source": {
"advisory": "GHSA-2wm5-q62r-hmrv",
"discovery": "UNKNOWN"
},
"title": "Colord: Slow rejection of oversized malformed color strings"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-85062",
"datePublished": "2026-09-03T20:30:12.768Z",
"dateReserved": "2026-09-02T21:21:01.774Z",
"dateUpdated": "2026-09-09T17:45:56.584Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-83619 (GCVE-0-2026-83619)
Vulnerability from cvelistv5 – Published: 2026-09-01 14:51 – Updated: 2026-09-01 18:05
VLAI
EPSS
VEX
Title
xmldom: End-tag Whitespace-Trim Regex ReDoS — quadratic backtracking in the 0.8.x end-tag parser
Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names with the unanchored global expression /[ \t\n\r]+$/g. For an end tag containing a long whitespace run followed by a non-whitespace character, the expression retries from each possible starting position and backtracks quadratically before failing its end anchor. DOMParser.parseFromString() reaches the path under default options, allowing a small unauthenticated XML input to stall the Node.js event loop; the 0.9.x and unscoped npm lines do not contain this expression. This issue is fixed in @xmldom/xmldom version 0.8.15.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 17:52 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/xmldom/xmldom/security/advisor… | x_refsource_CONFIRM |
| https://github.com/xmldom/xmldom/pull/1072 | x_refsource_MISC |
| https://github.com/xmldom/xmldom/commit/3abb0934f… | x_refsource_MISC |
| https://github.com/xmldom/xmldom/releases/tag/0.8.15 | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-83619",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T17:52:50.438353Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T18:05:22.049Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "xmldom",
"vendor": "xmldom",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.7.0, \u003c 0.8.15"
}
]
},
{
"product": "xmldom",
"vendor": "@xmldom",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.7.0, \u003c 0.8.15"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names with the unanchored global expression /[ \\t\\n\\r]+$/g. For an end tag containing a long whitespace run followed by a non-whitespace character, the expression retries from each possible starting position and backtracks quadratically before failing its end anchor. DOMParser.parseFromString() reaches the path under default options, allowing a small unauthenticated XML input to stall the Node.js event loop; the 0.9.x and unscoped npm lines do not contain this expression. This issue is fixed in @xmldom/xmldom version 0.8.15."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "CWE-1333: Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T14:51:28.121Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/xmldom/xmldom/security/advisories/GHSA-x4fp-j954-r2f4",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-x4fp-j954-r2f4"
},
{
"name": "https://github.com/xmldom/xmldom/pull/1072",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/xmldom/xmldom/pull/1072"
},
{
"name": "https://github.com/xmldom/xmldom/commit/3abb0934f5a8a84d83a1f9cde0f2bd04c08b2a09",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/xmldom/xmldom/commit/3abb0934f5a8a84d83a1f9cde0f2bd04c08b2a09"
},
{
"name": "https://github.com/xmldom/xmldom/releases/tag/0.8.15",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/xmldom/xmldom/releases/tag/0.8.15"
}
],
"source": {
"advisory": "GHSA-x4fp-j954-r2f4",
"discovery": "UNKNOWN"
},
"title": "xmldom: End-tag Whitespace-Trim Regex ReDoS \u2014 quadratic backtracking in the 0.8.x end-tag parser"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-83619",
"datePublished": "2026-09-01T14:51:28.121Z",
"dateReserved": "2026-08-31T20:36:25.744Z",
"dateUpdated": "2026-09-01T18:05:22.049Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-83606 (GCVE-0-2026-83606)
Vulnerability from cvelistv5 – Published: 2026-09-01 14:21 – Updated: 2026-09-01 14:57
VLAI
EPSS
VEX
Title
xmldom PI grammar regex ReDoS: quadratic backtracking on unterminated processing instructions
Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0-beta.9 until 0.9.11, the processing-instruction production in lib/grammar.js lets the greedy S+ separator and lazy Char*? data group repeatedly repartition a long whitespace tail when the required closing ?> is absent. Both parsePI and parseProcessingInstruction apply the expression to the entire remaining source, causing quadratic backtracking during DOMParser.parseFromString() under default options and allowing a small unauthenticated XML input to stall the Node.js event loop. This issue is fixed in @xmldom/xmldom version 0.9.11.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:57 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/xmldom/xmldom/security/advisor… | x_refsource_CONFIRM |
| https://github.com/xmldom/xmldom/pull/1039 | x_refsource_MISC |
| https://github.com/xmldom/xmldom/commit/73df6b8bd… | x_refsource_MISC |
| https://github.com/xmldom/xmldom/releases/tag/0.9.11 | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-83606",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T14:57:15.918491Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T14:57:43.875Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-g53g-w8rj-fmg7"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "xmldom",
"vendor": "xmldom",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.9.0-beta.9, \u003c 0.9.11"
}
]
},
{
"product": "xmldom",
"vendor": "@xmldom",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.9.0-beta.9, \u003c 0.9.11"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0-beta.9 until 0.9.11, the processing-instruction production in lib/grammar.js lets the greedy S+ separator and lazy Char*? data group repeatedly repartition a long whitespace tail when the required closing ?\u003e is absent. Both parsePI and parseProcessingInstruction apply the expression to the entire remaining source, causing quadratic backtracking during DOMParser.parseFromString() under default options and allowing a small unauthenticated XML input to stall the Node.js event loop. This issue is fixed in @xmldom/xmldom version 0.9.11."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "CWE-1333: Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T14:21:27.215Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/xmldom/xmldom/security/advisories/GHSA-g53g-w8rj-fmg7",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-g53g-w8rj-fmg7"
},
{
"name": "https://github.com/xmldom/xmldom/pull/1039",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/xmldom/xmldom/pull/1039"
},
{
"name": "https://github.com/xmldom/xmldom/commit/73df6b8bdbd86f904b9e8c3ab9c49aa54ef2802e",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/xmldom/xmldom/commit/73df6b8bdbd86f904b9e8c3ab9c49aa54ef2802e"
},
{
"name": "https://github.com/xmldom/xmldom/releases/tag/0.9.11",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/xmldom/xmldom/releases/tag/0.9.11"
}
],
"source": {
"advisory": "GHSA-g53g-w8rj-fmg7",
"discovery": "UNKNOWN"
},
"title": "xmldom PI grammar regex ReDoS: quadratic backtracking on unterminated processing instructions"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-83606",
"datePublished": "2026-09-01T14:21:27.215Z",
"dateReserved": "2026-08-31T20:36:25.743Z",
"dateUpdated": "2026-09-01T14:57:43.875Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-80206 (GCVE-0-2026-80206)
Vulnerability from cvelistv5 – Published: 2026-08-26 10:28 – Updated: 2026-08-26 12:52
VLAI
EPSS
VEX
Title
NLTK 3.10.2 Regular Expression Denial of Service via tgrep
Summary
NLTK before 3.10.3 contains a regular expression denial of service (ReDoS) vulnerability in the tgrep module. The _tgrep_node_action function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or timeout. An attacker who controls the tgrep pattern (e.g., via tgrep_positions() or tgrep_compile() exposed to external input) can supply a pattern that triggers catastrophic backtracking, causing indefinite CPU saturation that blocks the Python process.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 12:52 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nltk/nltk/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/nltk-3.10.2-… | third-party-advisory |
Impacted products
Date Public
2026-08-12 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-80206",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-26T12:52:03.078501Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-26T12:52:23.513Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/nltk/nltk/security/advisories/GHSA-w3v8-gmh9-3wv7"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:pypi/nltk",
"product": "nltk",
"vendor": "nltk",
"versions": [
{
"lessThan": "3.10.3",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.10.3",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.10.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "infycore"
},
{
"lang": "en",
"type": "analyst",
"value": "ekaf"
},
{
"lang": "en",
"type": "finder",
"value": "agent-kira"
}
],
"datePublic": "2026-08-12T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "NLTK before 3.10.3 contains a regular expression denial of service (ReDoS) vulnerability in the tgrep module. The _tgrep_node_action function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or timeout. An attacker who controls the tgrep pattern (e.g., via tgrep_positions() or tgrep_compile() exposed to external input) can supply a pattern that triggers catastrophic backtracking, causing indefinite CPU saturation that blocks the Python process."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-26T10:28:15.035Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-w3v8-gmh9-3wv7)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/nltk/nltk/security/advisories/GHSA-w3v8-gmh9-3wv7"
},
{
"name": "VulnCheck Advisory: NLTK 3.10.2 Regular Expression Denial of Service via tgrep",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/nltk-3.10.2-regular-expression-denial-of-service-via-tgrep"
}
],
"title": "NLTK 3.10.2 Regular Expression Denial of Service via tgrep",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-80206",
"datePublished": "2026-08-26T10:28:15.035Z",
"dateReserved": "2026-08-25T23:15:39.155Z",
"dateUpdated": "2026-08-26T12:52:23.513Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-80205 (GCVE-0-2026-80205)
Vulnerability from cvelistv5 – Published: 2026-08-26 10:28 – Updated: 2026-09-01 22:06
VLAI
EPSS
VEX
Title
NLTK before 3.10.0 ReDoS via Text.findall() unvalidated regex
Summary
NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall() and TokenSearcher.findall() methods that accept user-supplied regular expressions without validation or timeout. Attackers can supply crafted regex patterns that cause catastrophic backtracking, resulting in indefinite CPU saturation and denial of service to all users of the Python process.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 15:58 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/nltk/nltk/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/nltk-before-… | third-party-advisory |
| http://www.openwall.com/lists/oss-security/2026/09/01/3 |
Impacted products
Date Public
2026-08-12 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-80205",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-26T15:58:57.043941Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-26T16:09:59.270Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-09-01T22:06:44.235Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/09/01/3"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:pypi/nltk",
"product": "nltk",
"vendor": "nltk",
"versions": [
{
"lessThan": "3.10.0",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "3.10.0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*",
"versionEndExcluding": "3.10.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "infycore"
},
{
"lang": "en",
"type": "analyst",
"value": "ekaf"
},
{
"lang": "en",
"type": "finder",
"value": "agent-kira"
}
],
"datePublic": "2026-08-12T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall() and TokenSearcher.findall() methods that accept user-supplied regular expressions without validation or timeout. Attackers can supply crafted regex patterns that cause catastrophic backtracking, resulting in indefinite CPU saturation and denial of service to all users of the Python process."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-26T10:28:14.352Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-rrv8-h7p8-rx55)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/nltk/nltk/security/advisories/GHSA-rrv8-h7p8-rx55"
},
{
"name": "VulnCheck Advisory: NLTK before 3.10.0 ReDoS via Text.findall() unvalidated regex",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/nltk-before-3.10.0-redos-via-text-findall-unvalidated-regex"
}
],
"title": "NLTK before 3.10.0 ReDoS via Text.findall() unvalidated regex",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-80205",
"datePublished": "2026-08-26T10:28:14.352Z",
"dateReserved": "2026-08-25T23:15:39.155Z",
"dateUpdated": "2026-09-01T22:06:44.235Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-79770 (GCVE-0-2026-79770)
Vulnerability from cvelistv5 – Published: 2026-08-25 15:16 – Updated: 2026-09-16 15:51
VLAI
EPSS
VEX
Title
Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer
Summary
Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifier tokenization. Attackers can inject adversarial CSS selectors into methods like Node#css, Node#at_css, and Searchable#search to cause exponential regex backtracking and denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 16:10 UTC
CWE
- CWE-1333 - Inefficient Regular Expression Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/sparklemotion/nokogiri/securit… | vendor-advisory |
| https://www.vulncheck.com/advisories/nokogiri-bef… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| sparklemotion | nokogiri |
Affected:
0 , < 1.19.3
(semver)
Unaffected: 1.19.3 (semver) cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:* |
Date Public
2026-04-27 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-79770",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-25T16:10:25.348193Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-16T15:51:27.061Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageURL": "pkg:gem/nokogiri",
"product": "nokogiri",
"vendor": "sparklemotion",
"versions": [
{
"lessThan": "1.19.3",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.19.3",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:nokogiri:nokogiri:*:*:*:*:*:*:*:*",
"versionEndExcluding": "1.19.3",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "colby-swandale"
},
{
"lang": "en",
"type": "finder",
"value": "flavorjones"
}
],
"datePublic": "2026-04-27T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifier tokenization. Attackers can inject adversarial CSS selectors into methods like Node#css, Node#at_css, and Searchable#search to cause exponential regex backtracking and denial of service."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE"
},
"format": "CVSS"
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1333",
"description": "Inefficient Regular Expression Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-25T15:16:03.059Z",
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck"
},
"references": [
{
"name": "GitHub Security Advisory (GHSA-c4rq-3m3g-8wgx)",
"tags": [
"vendor-advisory"
],
"url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-c4rq-3m3g-8wgx"
},
{
"name": "VulnCheck Advisory: Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer",
"tags": [
"third-party-advisory"
],
"url": "https://www.vulncheck.com/advisories/nokogiri-before-redos-via-css-selector-tokenizer"
}
],
"title": "Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer",
"x_generator": {
"engine": "vulncheck-endgame"
}
}
},
"cveMetadata": {
"assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"assignerShortName": "VulnCheck",
"cveId": "CVE-2026-79770",
"datePublished": "2026-08-25T15:16:03.059Z",
"dateReserved": "2026-08-25T14:29:43.528Z",
"dateUpdated": "2026-09-16T15:51:27.061Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Architecture and Design
Use regular expressions that do not support backtracking, e.g. by removing nested quantifiers.
Mitigation
System Configuration
Set backtracking limits in the configuration of the regular expression implementation, such as PHP's pcre.backtrack_limit. Also consider limits on execution time for the process.
Mitigation
Implementation
Do not use regular expressions with untrusted input. If regular expressions must be used, avoid using backtracking in the expression.
Mitigation
Implementation
Limit the length of the input that the regular expression will process.
CAPEC-492: Regular Expression Exponential Blowup
An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.