by Kastro CVE-2026-76183
Apache Software Foundation Apache Tomcat — Apache Tomcat: Bypass of security constraints for WebSocket endpoints
Description · from the CVE record
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.
Affected
ProductAffectedFixed inSource
Apache Tomcat11.0.0-M1 – 11.0.25–CNA
Apache Tomcat10.1.0-M1 – 10.1.59–CNA
Apache Tomcat9.0.0.M1 – 9.0.121–CNA
Apache Tomcat8.5.0 – 8.5.100–CNA
Apache Tomcat7.0.43 – 7.0.109–CNA
Scores by source
CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total