{"id":"BIT-tomcat-2026-76183","summary":"Apache Tomcat: Bypass of security constraints for WebSocket endpoints","details":"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 through 11.0.25, from 10.1.0 through 10.1.59, from 9.0.0 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.","aliases":["CVE-2026-76183"],"modified":"2026-10-01T10:00:17.130967340Z","published":"2026-10-01T09:36:26.067Z","database_specific":{"cpes":["cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*","cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"],"severity":"Critical"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/09/23/21"},{"type":"WEB","url":"https://lists.apache.org/thread/45mxk8nj2q8pkhct6lfxkvtm2jpywrsp"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76183"}],"affected":[{"package":{"name":"tomcat","ecosystem":"Bitnami","purl":"pkg:bitnami/tomcat"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.45"},{"introduced":"10.1.0"},{"fixed":"10.1.60"},{"introduced":"11.0.0"},{"fixed":"11.0.26"},{"introduced":"9.0.0"},{"fixed":"9.0.122"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-76183.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}],"schema_version":"1.9.0"}