{"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":"2026-10-16T22:04:46.619Z"},"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"}},"adp":[{"references":[{"url":"https://github.com/oauthlib/oauthlib/security/advisories/GHSA-hj66-6f7g-4r5v","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-16T22:04:19.260810Z","id":"CVE-2026-49264","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-16T22:04:46.619Z"}}]}}