CVE-2026-66001 (GCVE-0-2026-66001)
Vulnerability from cvelistv5 – Published: 2026-08-20 18:27 – Updated: 2026-08-20 18:27
VLAI
EPSS
VEX
Title
Frappe: Improper Authorization in OAuth2 Consent Endpoint
Summary
Frappe is a full-stack web application framework. Prior to 15.114.0 and 16.26.0, the approve and authorize functions in frappe/integrations/oauth2.py allow the OAuth2 consent flow to proceed without restricting approve to POST, without a csrf_token in frappe/templates/includes/oauth_confirmation.html, and without scoping an active OAuth token check to the requesting client. An attacker can cause an authenticated user to approve an OAuth grant or reuse authorization state for the wrong client, exposing data and permitting actions within the granted scopes. This issue is fixed in versions 15.114.0 and 16.26.0.
Severity
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/frappe/frappe/security/advisor… | x_refsource_CONFIRM |
| https://github.com/frappe/frappe/pull/40073 | x_refsource_MISC |
| https://github.com/frappe/frappe/pull/40700 | x_refsource_MISC |
| https://github.com/frappe/frappe/pull/40701 | x_refsource_MISC |
| https://github.com/frappe/frappe/commit/336c7d335… | x_refsource_MISC |
| https://github.com/frappe/frappe/commit/d7460769f… | x_refsource_MISC |
| https://github.com/frappe/frappe/commit/eb9c1446c… | x_refsource_MISC |
| https://github.com/frappe/frappe/releases/tag/v15.114.0 | x_refsource_MISC |
| https://github.com/frappe/frappe/releases/tag/v16.26.0 | x_refsource_MISC |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "frappe",
"vendor": "frappe",
"versions": [
{
"status": "affected",
"version": "\u003c 15.114.0"
},
{
"status": "affected",
"version": "\u003e= 16.0.0-beta.1, \u003c 16.26.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Frappe is a full-stack web application framework. Prior to 15.114.0 and 16.26.0, the approve and authorize functions in frappe/integrations/oauth2.py allow the OAuth2 consent flow to proceed without restricting approve to POST, without a csrf_token in frappe/templates/includes/oauth_confirmation.html, and without scoping an active OAuth token check to the requesting client. An attacker can cause an authenticated user to approve an OAuth grant or reuse authorization state for the wrong client, exposing data and permitting actions within the granted scopes. This issue is fixed in versions 15.114.0 and 16.26.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.5,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "ACTIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-352",
"description": "CWE-352: Cross-Site Request Forgery (CSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-20T18:27:32.056Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/frappe/frappe/security/advisories/GHSA-2ph8-x773-8p2x",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/frappe/frappe/security/advisories/GHSA-2ph8-x773-8p2x"
},
{
"name": "https://github.com/frappe/frappe/pull/40073",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/pull/40073"
},
{
"name": "https://github.com/frappe/frappe/pull/40700",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/pull/40700"
},
{
"name": "https://github.com/frappe/frappe/pull/40701",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/pull/40701"
},
{
"name": "https://github.com/frappe/frappe/commit/336c7d335db762b494acdfe43aea69d459fd51d7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/commit/336c7d335db762b494acdfe43aea69d459fd51d7"
},
{
"name": "https://github.com/frappe/frappe/commit/d7460769f999c68d3121b680119f8724ddd3eb9d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/commit/d7460769f999c68d3121b680119f8724ddd3eb9d"
},
{
"name": "https://github.com/frappe/frappe/commit/eb9c1446cac13236c6d573b136786db2e46254fa",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/commit/eb9c1446cac13236c6d573b136786db2e46254fa"
},
{
"name": "https://github.com/frappe/frappe/releases/tag/v15.114.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/releases/tag/v15.114.0"
},
{
"name": "https://github.com/frappe/frappe/releases/tag/v16.26.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/frappe/frappe/releases/tag/v16.26.0"
}
],
"source": {
"advisory": "GHSA-2ph8-x773-8p2x",
"discovery": "UNKNOWN"
},
"title": "Frappe: Improper Authorization in OAuth2 Consent Endpoint"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-66001",
"datePublished": "2026-08-20T18:27:32.056Z",
"dateReserved": "2026-07-23T18:54:15.833Z",
"dateUpdated": "2026-08-20T18:27:32.056Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-66001",
"date": "2026-08-23",
"epss": "0.00233",
"percentile": "0.14445"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-66001\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-08-20T19:16:58.020\",\"lastModified\":\"2026-08-20T19:16:58.020\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Frappe is a full-stack web application framework. Prior to 15.114.0 and 16.26.0, the approve and authorize functions in frappe/integrations/oauth2.py allow the OAuth2 consent flow to proceed without restricting approve to POST, without a csrf_token in frappe/templates/includes/oauth_confirmation.html, and without scoping an active OAuth token check to the requesting client. An attacker can cause an authenticated user to approve an OAuth grant or reuse authorization state for the wrong client, exposing data and permitting actions within the granted scopes. This issue is fixed in versions 15.114.0 and 16.26.0.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"frappe\",\"product\":\"frappe\",\"versions\":[{\"version\":\"\u003c 15.114.0\",\"status\":\"affected\"},{\"version\":\"\u003e= 16.0.0-beta.1, \u003c 16.26.0\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X\",\"baseScore\":8.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"ACTIVE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-352\"}]}],\"references\":[{\"url\":\"https://github.com/frappe/frappe/commit/336c7d335db762b494acdfe43aea69d459fd51d7\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/commit/d7460769f999c68d3121b680119f8724ddd3eb9d\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/commit/eb9c1446cac13236c6d573b136786db2e46254fa\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/pull/40073\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/pull/40700\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/pull/40701\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/releases/tag/v15.114.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/releases/tag/v16.26.0\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/frappe/frappe/security/advisories/GHSA-2ph8-x773-8p2x\",\"source\":\"security-advisories@github.com\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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