CVE-2026-50627: Apache Cxf

Critical severity, CVSS 9.1. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Cxf: before 4.1.7 (fixed in 4.1.7); from 4.2.0, before 4.2.2 (fixed in 4.2.2)

Published 2026-06-12. Last modified 2026-08-07.