{"id":"CVE-2026-76183","published":"2026-09-23T12:17:06.537","lastModified":"2026-09-23T19:19:14.877","description":"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 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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-289"],"vendors":[],"products":[],"references":[{"url":"https://lists.apache.org/thread/45mxk8nj2q8pkhct6lfxkvtm2jpywrsp","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/09/23/21","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This flaw allows authentication bypass for WebSocket endpoints, enabling unauthorized access. It matters because it can lead to full compromise of the application and system.","exploitability":"Exploitation is relatively easy given the alternate name vulnerability, requiring only knowledge of the alternate name to bypass security constraints.","blast_radius":"If exploited, this can result in unauthorized access to sensitive WebSocket endpoints, potentially leading to data theft or system compromise.","remediation":"Upgrade to Apache Tomcat version 11.0.26, 10.1.60, or 9.0.122, which address the issue.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","web","websocket","tomcat"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-28T08:47:41.983Z"}}