Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-50627US | critical9.1 | — | ||
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… | ||||
02
references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/06/11/4WEB
- https://access.redhat.com/errata/RHSA-2026:37390WEB
- https://access.redhat.com/security/cve/CVE-2026-50627WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=2488298WEB
- https://github.com/apache/cxfPACKAGE
- https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-50627ADVISORY
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.jsonWEB
scry
Advisories like this name the exposed products attackers go after on your perimeter. See what is exposed on your perimeter with a free passive scan.
Free scan