CVE-2026-50627: Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator
(updated )
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, which fixes this issue.
References
- access.redhat.com/errata/RHSA-2026:37390
- access.redhat.com/security/cve/CVE-2026-50627
- bugzilla.redhat.com/show_bug.cgi?id=2488298
- github.com/advisories/GHSA-9mrv-8pvf-hf4m
- lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m
- nvd.nist.gov/vuln/detail/CVE-2026-50627
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json
Code Behaviors & Features
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