CVE-2026-50627
Critical
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 or 3.6.12, which fixes this issue.
SeverityCritical
CVSS9.1
Exploit probability—
Product
Apache Cxf
PublishedJun 12, 2026
First seenJun 12, 2026
Weakness typeCWE-289CWE-289
How to fix
Update
- apache cxf4.1.7, 4.2.2, 3.6.12 or later
- org.apache.cxf:cxf-rt-rs-security-oauth24.2.2, 4.1.7 or later
- redhat build_of_apache_camel4.18.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache cxf | v < 4.1.7, 4.2.0 ≤ v < 4.2.2, v < 3.6.12, 4.0.0 ≤ v < 4.1.7 | 4.1.7, 4.2.2, 3.6.12 |
| org.apache.cxf:cxf-rt-rs-security-oauth2Maven | 4.2.0 ≤ v < 4.2.2, v < 4.1.7 | 4.2.2, 4.1.7 |
| redhat build_of_apache_camel | v < 4.18.1, 4.18.1 | 4.18.1 |
| redhat fuse | 7.0.0 | — |
| redhat jboss_web_server | 5.0 | — |
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