CVE-2026-76183
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.
- Score
- CVSS 3.1 9.8 Critical
- Status
- Awaiting Analysis - security@apache.org
- Published
- 2026-09-23
- Last modified
- 2026-09-30
- Weaknesses
- CWE-289
Affected products
References
- https://lists.apache.org/thread/45mxk8nj2q8pkhct6lfxkvtm2jpywrsp
- http://www.openwall.com/lists/oss-security/2026/09/23/21
