CVE-2026-50627
Published:June 12, 2026
Updated:June 28, 2026
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
https://github.com/apache/cxf.git (GITHUB):
Affected version(s) >=cxf-2.1 <cxf-4.1.7Fix Suggestion:
Update to version cxf-4.1.7https://github.com/apache/cxf.git (GITHUB):
Affected version(s) >=cxf-4.2.0 <cxf-4.2.2Fix Suggestion:
Update to version cxf-4.2.2org.apache.cxf:cxf-rt-rs-security-oauth2 (JAVA):
Affected version(s) >=4.2.0 <4.2.2Fix Suggestion:
Update to version 4.2.2org.apache.cxf:cxf-rt-rs-security-oauth2 (JAVA):
Affected version(s) >=2.6.0 <4.1.7Fix Suggestion:
Update to version 4.1.7Related Resources (2)
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Contact UsCVSS v4
Base Score:
9.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Authentication Bypass by Alternate Name
EPSS
Base Score:
0.39