{"schema_version": "1.6.1", "id": "CVE-2026-50627", "summary": "OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator", "details": "The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' (Audience) claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "4.2.0"}, {"fixed": "4.2.2"}]}, {"type": "SEMVER", "events": [{"introduced": "4.0.0"}, {"fixed": "4.1.7"}]}, {"type": "SEMVER", "events": [{"introduced": "0"}, {"fixed": "3.6.12"}]}]}], "references": [{"type": "WEB", "url": "https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m"}]}