Apache CXF: JwtRequestCodeFilter silently overrides outer PKCE and nonce parameters
At a glance
Severity
CRITICAL 9.1
EPSS
EPSS 0.28 % · percentile 21 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
apache
NVD status
Modified
Description
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.
