CVE-2026-50627
Medium
Elevated severity or exploit probability.
CVSS base
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.8%
53.9th percentile
CISA KEV
Not listed
Weakness / dates
CWE-303
Published 2026-06-12 · modified 2026-08-07
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.
Affected
References
- https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m
- http://www.openwall.com/lists/oss-security/2026/06/11/4
- 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