CVE-2026-50627

CRITICAL

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

Title source: cna
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 9.1
EPSS 0.0042
EPSS Percentile 33.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-289 CWE-303
Status published
Products (3)
apache/cxf < 4.1.7
Apache Software Foundation/Apache CXF < 4.1.7
Apache Software Foundation/Apache CXF 4.2.0 - 4.2.2
Published Jun 12, 2026
Tracked Since Jun 12, 2026