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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, which fixes this issue.

PUBLISHED Reserved 2026-06-05 | Published 2026-06-12 | Updated 2026-06-15 | Assigner apache

Problem types

CWE-289 Authentication Bypass by Alternate Name

Product status

Default status
unaffected

4.2.0 (semver) before 4.2.2
affected

Any version before 4.1.7
affected

Credits

Guanping Zhang reported this vulnerability. finder

References

www.openwall.com/lists/oss-security/2026/06/11/4

lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m vendor-advisory

cve.org (CVE-2026-50627)

nvd.nist.gov (CVE-2026-50627)

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