CVE-2026-50627
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.45% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-289, CWE-303
- Affected
- apache/cxf
- Source
- security@apache.org
References
- https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/06/11/4Mailing List, Third 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.