Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M1 through 9.0.121.
The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.43 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Apache Tomcat | — | Upgrade Apache Tomcat to 10.1.60Upgrade Apache Tomcat to 9.0.122Upgrade Apache Tomcat to the latest available versionUpgrade Apache Tomcat to 11.0.26 | Sep 24, 2026 | Sep 23, 2026 |
| Redhat_linux | — | No solution exists | Oct 1, 2026 | Sep 23, 2026 |
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