Common Weakness Enumeration
CWE-407
Allowed-with-ReviewInefficient Algorithmic Complexity
Abstraction: Class · Status: Incomplete
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
272 vulnerabilities reference this CWE, most recent first.
CVE-2026-35599 (GCVE-0-2026-35599)
Vulnerability from cvelistv5 – Published: 2026-04-10 16:05 – Updated: 2026-04-10 18:28
VLAI
EPSS
VEX
Title
Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler
Summary
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. This vulnerability is fixed in 2.3.0.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-10 18:27 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | x_refsource_CONFIRM |
| https://github.com/go-vikunja/vikunja/pull/2577 | x_refsource_MISC |
| https://github.com/go-vikunja/vikunja/commit/6df0… | x_refsource_MISC |
| https://github.com/go-vikunja/vikunja/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
< 2.3.0
|
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CVE-2026-34827 (GCVE-0-2026-34827)
Vulnerability from cvelistv5 – Published: 2026-04-02 17:07 – Updated: 2026-07-15 01:03
VLAI
EPSS
VEX
Title
Rack: Algorithmic-Complexity DoS in Rack::Multipart::Parser
Summary
Rack is a modular Ruby web server interface. From versions 3.0.0.beta1 to before 3.1.21, and 3.2.0 to before 3.2.6, Rack::Multipart::Parser#handle_mime_head parses quoted multipart parameters such as Content-Disposition: form-data; name="..." using repeated String#index searches combined with String#slice! prefix deletion. For escape-heavy quoted values, this causes super-linear processing. An unauthenticated attacker can send a crafted multipart/form-data request containing many parts with long backslash-escaped parameter values to trigger excessive CPU usage during multipart parsing. This results in a denial of service condition in Rack applications that accept multipart form data. This issue has been patched in versions 3.1.21 and 3.2.6.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:42 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/rack/rack/security/advisories/… | x_refsource_CONFIRM |
| https://access.redhat.com/security/cve/CVE-2026-34827 | vdb-entryx_refsource_REDHAT |
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Impacted products
7 products
| Vendor | Product | Version | |
|---|---|---|---|
| rack | rack |
Affected:
>= 3.0.0.beta1, < 3.1.21
Affected: >= 3.2.0, < 3.2.6 |
|
| Red Hat | Logging Subsystem for Red Hat OpenShift |
cpe:/a:redhat:logging:5
|
|
| Red Hat | Red Hat 3scale API Management Platform 2 |
cpe:/a:redhat:red_hat_3scale_amp:2
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
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CVE-2026-34573 (GCVE-0-2026-34573)
Vulnerability from cvelistv5 – Published: 2026-03-31 15:06 – Updated: 2026-03-31 18:52
VLAI
EPSS
VEX
Title
Parse Server: GraphQL complexity validator exponential fragment traversal DoS
Summary
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.68 and 9.7.0-alpha.12, the GraphQL query complexity validator can be exploited to cause a denial-of-service by sending a crafted query with binary fan-out fragment spreads. A single unauthenticated request can block the Node.js event loop for seconds, denying service to all concurrent users. This only affects deployments that have enabled the requestComplexity.graphQLDepth or requestComplexity.graphQLFields configuration options. This issue has been patched in versions 8.6.68 and 9.7.0-alpha.12.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 18:50 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/parse-community/parse-server/s… | x_refsource_CONFIRM |
| https://github.com/parse-community/parse-server/p… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/p… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/c… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/c… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| parse-community | parse-server |
Affected:
< 8.6.68
Affected: >= 9.0.0, < 9.7.0-alpha.12 |
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CVE-2026-34230 (GCVE-0-2026-34230)
Vulnerability from cvelistv5 – Published: 2026-04-02 16:41 – Updated: 2026-04-03 18:19
VLAI
EPSS
VEX
Title
Rack: Quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header
Summary
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Utils.select_best_encoding processes Accept-Encoding values with quadratic time complexity when the header contains many wildcard (*) entries. Because this method is used by Rack::Deflater to choose a response encoding, an unauthenticated attacker can send a single request with a crafted Accept-Encoding header and cause disproportionate CPU consumption on the compression middleware path. This results in a denial of service condition for applications using Rack::Deflater. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:56 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/rack/rack/security/advisories/… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-33123 (GCVE-0-2026-33123)
Vulnerability from cvelistv5 – Published: 2026-03-20 09:09 – Updated: 2026-03-20 18:07
VLAI
EPSS
VEX
Title
pypdf has inefficient decoding of array-based streams
Summary
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Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-20 16:03 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3686 | x_refsource_MISC |
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CVE-2026-33033 (GCVE-0-2026-33033)
Vulnerability from cvelistv5 – Published: 2026-04-07 14:22 – Updated: 2026-04-07 15:21
VLAI
EPSS
VEX
Title
Potential denial-of-service vulnerability in MultiPartParser via base64-encoded file upload
Summary
An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30.
`MultiPartParser` allows remote attackers to degrade performance by submitting multipart uploads with `Content-Transfer-Encoding: base64` including excessive whitespace.
Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django would like to thank Seokchan Yoon for reporting this issue.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-07 15:21 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://docs.djangoproject.com/en/dev/releases/se… | vendor-advisory |
| https://groups.google.com/g/django-announce | mailing-list |
| https://www.djangoproject.com/weblog/2026/apr/07/… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| djangoproject | Django |
Affected:
6.0 , < 6.0.4
(semver)
Unaffected: 6.0.4 (semver) Affected: 5.2 , < 5.2.13 (semver) Unaffected: 5.2.13 (semver) Affected: 4.2 , < 4.2.30 (semver) Unaffected: 4.2.30 (semver) |
Date Public
2026-04-07 09:00
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CVE-2026-31937 (GCVE-0-2026-31937)
Vulnerability from cvelistv5 – Published: 2026-04-02 14:38 – Updated: 2026-04-03 15:59
VLAI
EPSS
VEX
Title
Suricata dcerpc: quadratic complexity in dcerpc buffering
Summary
Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 15:58 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OISF/suricata/security/advisor… | x_refsource_CONFIRM |
| https://redmine.openinfosecfoundation.org/issues/8304 | x_refsource_MISC |
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CVE-2026-31934 (GCVE-0-2026-31934)
Vulnerability from cvelistv5 – Published: 2026-04-02 14:21 – Updated: 2026-04-02 15:00
VLAI
EPSS
VEX
Title
Suricata smtp/mine: quadratic complexity in extracting urls
Summary
Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, there is a quadratic complexity issue when searching for URLs in mime encoded messages over SMTP leading to a performance impact. This issue has been patched in version 8.0.4.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 15:00 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
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CVE-2026-31933 (GCVE-0-2026-31933)
Vulnerability from cvelistv5 – Published: 2026-04-02 14:03 – Updated: 2026-04-03 16:01
VLAI
EPSS
VEX
Title
Suricata stream: quadratic complexity in stream inspection
Summary
Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, specially crafted traffic can cause Suricata to slow down, affecting performance in IDS mode. This issue has been patched in versions 7.0.15 and 8.0.4.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 16:00 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OISF/suricata/security/advisor… | x_refsource_CONFIRM |
| https://redmine.openinfosecfoundation.org/issues/8272 | x_refsource_MISC |
Impacted products
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CVE-2026-31932 (GCVE-0-2026-31932)
Vulnerability from cvelistv5 – Published: 2026-04-02 14:02 – Updated: 2026-04-02 18:33
VLAI
EPSS
VEX
Title
Suricata krb5: quadratic complexity in krb5 buffering
Summary
Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, inefficiency in KRB5 buffering can lead to performance degradation. This issue has been patched in versions 7.0.15 and 8.0.4.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:33 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OISF/suricata/security/advisor… | x_refsource_CONFIRM |
| https://redmine.openinfosecfoundation.org/issues/8305 | x_refsource_MISC |
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"discovery": "UNKNOWN"
},
"title": "Suricata krb5: quadratic complexity in krb5 buffering"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-31932",
"datePublished": "2026-04-02T14:02:40.205Z",
"dateReserved": "2026-03-10T15:10:10.654Z",
"dateUpdated": "2026-04-02T18:33:25.016Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.