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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-63687

Apache CXF: JwtRequestCodeFilter silently overrides outer PKCE and nonce parameters

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Status
Published
Published
Updated
Assigning organization
apache

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Apache Software Foundation Apache CXF

Default version status: unaffected

  • 4.2.0 to < 4.2.3affected
  • 4.0.0 to < 4.1.8affected
  • 0 to < 3.6.12affected

References