Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Cxf | < 4.1.7 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/06/11/4Mailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2026:37390
- https://access.redhat.com/security/cve/CVE-2026-50627
- https://bugzilla.redhat.com/show_bug.cgi?id=2488298
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json
FAQ
What is CVE-2026-50627?
CVE-2026-50627 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 replaye...
How severe is CVE-2026-50627?
CVE-2026-50627 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-50627?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Cxf.