CVE-2026-49264

The OAuthLib Python library (versions 0.6.1 through 4.0.0) is vulnerable to an unsafe JSONP callback injection in its RevocationEndpoint (oauthlib/oauth2/rfc6749/endpoints/revocation.py). When JSONP support is enabled (enable_jsonp=True), the application fails to validate user-supplied callback p...

Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

SummaryWhen enablejsonp=True, oauthlib's RevocationEndpoint reflects the user-supplied callback parameter directly into JavaScript response bodies on both success and error paths without validating that it is a legal JSONP callback name. This allows arbitrary JavaScript response generation instea...

GHSA-HJ66-6F7G-4R5V Oauthlib : Unsafe JSONP callback injection in RevocationEndpoint allows arbitrary JavaScript response generation

Summary When enablejsonp=True, oauthlib's RevocationEndpoint reflects the user-supplied callback parameter directly into JavaScript response bodies on both success and error paths without validating that it is a legal JSONP callback name. This allows arbitrary JavaScript response generation inste...