CVE-2026-50627CWE-289CWE-303

CVE-2026-50627

Critical · published June 12, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
55.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00776 · 55.3th percentile
Weaknesses
CWE-289 · Authentication Bypass by Alternate Name; CWE-303 · Incorrect Implementation of Authentication Algorithm
Published
2026-06-12T14:16Z
Affected products (2)
ProductVersionsFixed in
apache/cxf< 4.1.74.1.7
apache/cxf≥ 4.2.0, < 4.2.24.2.2
References (6)
https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m · [email protected]http://www.openwall.com/lists/oss-security/2026/06/11/4 · af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2026:37390 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://access.redhat.com/security/cve/CVE-2026-50627 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://bugzilla.redhat.com/show_bug.cgi?id=2488298 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46chttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
EPSS history
Timeline
  • 12 JUN 08:55Z
    Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator
    cvelistv5