{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-49264", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-28T14:33:01.180Z", "datePublished": "2026-10-13T15:48:40.102Z", "dateUpdated": "2026-10-13T15:48:40.102Z"}, "containers": {"cna": {"title": "OAuthLib: Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-hj66-6f7g-4r5v", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-hj66-6f7g-4r5v"}, {"name": "https://github.com/oauthlib/oauthlib/pull/951", "tags": ["x_refsource_MISC"], "url": "https://github.com/oauthlib/oauthlib/pull/951"}, {"name": "https://github.com/oauthlib/oauthlib/commit/c888359f3c42bec235b2c5caab2069c9ed62457c", "tags": ["x_refsource_MISC"], "url": "https://github.com/oauthlib/oauthlib/commit/c888359f3c42bec235b2c5caab2069c9ed62457c"}, {"name": "https://github.com/oauthlib/oauthlib/releases/tag/v4.0.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/oauthlib/oauthlib/releases/tag/v4.0.0"}], "affected": [{"vendor": "oauthlib", "product": "oauthlib", "versions": [{"version": ">= 0.6.1, < 4.0.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-13T15:48:40.102Z"}, "descriptions": [{"lang": "en", "value": "OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 0.6.1 until 4.0.0, OAuthLib's RevocationEndpoint in oauthlib/oauth2/rfc6749/endpoints/revocation.py reflects an unvalidated callback request parameter into success and error response bodies when enable_jsonp=True. The callback can come from the query string or request body and is used without restricting it to a legal JavaScript function name. A browser application that loads the revocation response as trusted JSONP and permits attacker influence over callback can therefore execute attacker-controlled JavaScript in the including application's origin, with access to its DOM and script-accessible data. The feature is disabled by default, so only deployments that explicitly enable JSONP are affected. This issue is fixed in version 4.0.0."}], "source": {"advisory": "GHSA-hj66-6f7g-4r5v", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "oauthlib", "vendor": "oauthlib", "versions": [{"status": "affected", "version": ">= 0.6.1, < 4.0.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. From 0.6.1 until 4.0.0, OAuthLib's RevocationEndpoint in oauthlib/oauth2/rfc6749/endpoints/revocation.py reflects an unvalidated callback request parameter into success and error response bodies when enable_jsonp=True. The callback can come from the query string or request body and is used without restricting it to a legal JavaScript function name. A browser application that loads the revocation response as trusted JSONP and permits attacker influence over callback can therefore execute attacker-controlled JavaScript in the including application's origin, with access to its DOM and script-accessible data. The feature is disabled by default, so only deployments that explicitly enable JSONP are affected. This issue is fixed in version 4.0.0."}], "id": "CVE-2026-49264", "lastModified": "2026-10-13T16:17:20.560", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-13T16:17:20.560", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/commit/c888359f3c42bec235b2c5caab2069c9ed62457c"}, {"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/pull/951"}, {"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/releases/tag/v4.0.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-hj66-6f7g-4r5v"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}