GHSA-9mrv-8pvf-hf4m

Apache CXF OAuth2 Missing JWT Audience and Issuer Validation in Access Token Validator

At a glance

Published: 2026-06-12 12:31 UTC
Updated: 2026-08-20 18:48 UTC
CVE: CVE-2026-50627
CVSS_V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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.

Affected packages

Package	Versions
Maven · org.apache.cxf:cxf-rt-rs-security-oauth2	introduced 4.2.0, fixed 4.2.2
Maven · org.apache.cxf:cxf-rt-rs-security-oauth2	introduced 0, fixed 4.1.7

References

https://nvd.nist.gov/vuln/detail/CVE-2026-50627 ADVISORY
https://access.redhat.com/errata/RHSA-2026:37390 WEB
https://access.redhat.com/security/cve/CVE-2026-50627 WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2488298 WEB
https://github.com/apache/cxf PACKAGE
https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m WEB
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json WEB
http://www.openwall.com/lists/oss-security/2026/06/11/4 WEB

Sources

Source	Licence
OSV.dev	CC-BY 4.0 — GitHub Advisory Database