{"id":"CVE-2026-76183","title":"Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 throug…","summary":"Authentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 throug…","severity":"none","cwe":["CWE-289"],"vendor":"Apache Software Foundation","product":"Apache Tomcat","affected":["apache_tomcat >= 11.0.0-M1 <= 11.0.25","apache_tomcat >= 10.1.0-M1 <= 10.1.59","apache_tomcat >= 9.0.0.M1 <= 9.0.121","apache_tomcat >= 8.5.0 <= 8.5.100","apache_tomcat >= 7.0.43 <= 7.0.109","apache_tomcat < 7.0.43"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T12:17:06.537","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76183","references":[{"url":"https://lists.apache.org/thread/45mxk8nj2q8pkhct6lfxkvtm2jpywrsp","label":"security@apache.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-23T11:22:32.916Z","slug":"CVE-2026-76183","body":"## Overview\n\nAuthentication Bypass by Alternate Name vulnerability in Apache Tomcat allowed the security constraints for any WebSocket endpoint to be bypassed.\n\n\n\nThis 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.\n\n\n\nThe following versions were EOS at the time the CVE was created but are \nknown 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.\n\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}