CVE-2026-63687Apache CXF: JwtRequestCodeFilter silently overrides outer PKCE and nonce parameters

Descripción

Apache CXF's JwtRequestCodeFilter copies all claims from a signed request JWT into the authorization parameter map without excluding security-sensitive parameters. A client that can produce a validly-signed request JWT (e.g., one whose client_secret is known or compromised) can thereby substitute the code_challenge, code_challenge_method, nonce, and state values that were set in the outer HTTP request, undermining PKCE integrity and OpenID Connect replay protection. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• https://lists.apache.org/thread/drcq4chmt0btx86f17o47j17r378hzpw vendor-advisoryMailing ListVendor Advisory
• http://www.openwall.com/lists/oss-security/2026/08/06/22