Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.4%
exploitation probability
0.4%top 63% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products
Apache Software Foundation · Apache CXFReferences
https://access.redhat.com/errata/RHSA-2026:37390https://access.redhat.com/security/cve/CVE-2026-50627https://bugzilla.redhat.com/show_bug.cgi?id=2488298https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.jsonhttp://www.openwall.com/lists/oss-security/2026/06/11/4