{"id":"CVE-2026-43515","aliases":["BIT-tomcat-2026-43515","GHSA-5m62-pw8w-7w9f"],"url":"https://o3.security/vulnerability/CVE-2026-43515","summary":"Apache Tomcat: Security constraints not correctly applied","details":"Versions Affected:\nApache Tomcat 11.0.0-M1 to 11.0.21\nApache Tomcat 10.1.0-M1 to 10.1.54\nApache Tomcat 9.0.0.M1 to 9.0.117\nOlder, unsupported versions may also be affected\n\nDescription:\nWhen multiple security constraints defined an HTTP method constraint for\nthe same extension pattern, only the first method constraint was applied.\n\nMitigation:\nUsers of the affected versions should apply one of the following\nmitigations:\n- Upgrade to Apache Tomcat 11.0.22 or later\n- Upgrade to Apache Tomcat 10.1.55 or later\n- Upgrade to Apache Tomcat 9.0.118 or later","published":"2026-05-12T15:33:23.311Z","modified":"2026-09-22T12:41:42.066132562Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":{"score":0.01136,"percentile":0.64637,"asOf":"2026-09-11"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"9.0.118"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"10.1.55"},{"ecosystem":"Maven","name":"org.apache.tomcat.embed:tomcat-embed-core","fixedVersion":"11.0.22"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat","fixedVersion":"9.0.118"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat","fixedVersion":"10.1.55"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat","fixedVersion":"11.0.22"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-catalina","fixedVersion":"9.0.118"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-catalina","fixedVersion":"10.1.55"},{"ecosystem":"Maven","name":"org.apache.tomcat:tomcat-catalina","fixedVersion":"11.0.22"}],"fix":{"url":"https://github.com/apache/tomcat/commit/276087d9c7abbcecc6c4fb4e4b08cf64780c6e36","label":"apache/tomcat@276087d"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/12/11"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43515.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/746nxfxod0wsocxtmv8pb8nkgmwpc6bb"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43515"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/276087d9c7abbcecc6c4fb4e4b08cf64780c6e36"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/c621317382682206fb58ab92ebd3e1b6fdd10ce9"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/db919ff9912b4d61d1b702a1342b8bde39270031"},{"type":"PACKAGE","url":"https://github.com/apache/tomcat"},{"type":"WEB","url":"https://tomcat.apache.org/security-10.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-11.html"},{"type":"WEB","url":"https://tomcat.apache.org/security-9.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-22T12:41:42.066132562Z"}}