CVE-2026-50627: CWE-289 Authentication Bypass by Alternate Name in Apache Software Foundation Apache CXF
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.
AI Analysis
Technical Summary
The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' claim in JWT access tokens, permitting tokens intended for one Resource Server to be accepted by another. This authentication bypass vulnerability (CWE-289) can lead to token confusion or routing attacks. Users are advised to upgrade to Apache CXF versions 4.2.2 or 4.1.7 where this issue is resolved.
Potential Impact
An attacker can replay a JWT access token issued for one Resource Server against a different Resource Server, bypassing intended authentication boundaries. This can lead to unauthorized access or privilege escalation across resource servers relying on Apache CXF for JWT validation.
Mitigation Recommendations
Users should upgrade Apache CXF to version 4.2.2 or 4.1.7 or later, where the 'aud' claim validation issue in JwtAccessTokenValidator is fixed. No other mitigation or temporary workaround is indicated in the available data.
CVE-2026-50627: CWE-289 Authentication Bypass by Alternate Name in Apache Software Foundation Apache CXF
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.
Affected software
pkg:maven/Apache Software Foundation/org.apache.cxf:cxf-rt-rs-security-oauth2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' claim in JWT access tokens, permitting tokens intended for one Resource Server to be accepted by another. This authentication bypass vulnerability (CWE-289) can lead to token confusion or routing attacks. Users are advised to upgrade to Apache CXF versions 4.2.2 or 4.1.7 where this issue is resolved.
Potential Impact
An attacker can replay a JWT access token issued for one Resource Server against a different Resource Server, bypassing intended authentication boundaries. This can lead to unauthorized access or privilege escalation across resource servers relying on Apache CXF for JWT validation.
Mitigation Recommendations
Users should upgrade Apache CXF to version 4.2.2 or 4.1.7 or later, where the 'aud' claim validation issue in JwtAccessTokenValidator is fixed. No other mitigation or temporary workaround is indicated in the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-05T10:36:46.172Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2bd75be617e2d83448bfae
Added to database: 6/12/2026, 9:54:35 AM
Last enriched: 6/12/2026, 10:10:33 AM
Last updated: 6/12/2026, 1:23:39 PM
Views: 8
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.