{"vulnerability": "CVE-2026-49264", "sightings": [{"uuid": "53fd3921-01a1-47b7-885a-989032e2d907", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "86ecb4e1-bb32-44d5-9f39-8a4673af8385", "vulnerability": "CVE-2026-49264", "type": "published-proof-of-concept", "source": "https://github.com/oauthlib/oauthlib/security/advisories/GHSA-hj66-6f7g-4r5v", "content": "", "creation_timestamp": "2026-09-28T09:10:50.000000Z"}, {"uuid": "ded73504-d59e-474b-8ddd-af49a5e079f6", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-49264", "type": "seen", "source": "https://infosec.exchange/users/cve/statuses/117434421011343396", "content": "CVE-2026-49264 OAuthLib: Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation 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.\nhttps://www.cve.org/CVERecord?id=CVE-2026-49264https://github.com/oauthlib/oauthlib/security/advisories/GHSA-hj66-6f7g-4r5vhttps://github.com/oauthlib/oauthlib/pull/951https://github.com/oauthlib/oauthlib/commit/c888359f3c42bec235b2c5caab2069c9ed62457chttps://github.com/oauthlib/oauthlib/releases/tag/v4.0.0#oauthlib#CVE_2026_49264#bot", "creation_timestamp": "2026-10-13T15:57:44.773908Z"}]}