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CVE-2026-50627

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

Published: Jun 12, 2026Updated: Jun 15, 2026 Sources: CVE List NVDCWE-289
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.5%
Top 60.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-289

Affected Products

Apache CXFApache Software Foundation
Library
OSS Libraries / generic-library
cxfapache
LibraryLibrary
OSS Libraries / generic-library
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd

Exploitability

Official Patch Available

References

https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1m
lists.apache.org
http://www.openwall.com/lists/oss-security/2026/06/11/4
openwall.com

Timeline

Published
Jun 12, 2026
Last Updated
Jun 15, 2026

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