{"id":"CVE-2026-66422","aliases":["BIT-tomcat-2026-66422"],"url":"https://o3.security/vulnerability/CVE-2026-66422","summary":"Apache Tomcat: Servlet role references can bypass declarative role constraints","details":"Improper Authorization vulnerability in Apache Tomcat cause by security-role-ref definitions being incorrectly used as role aliases within the Realm in additional to the correct usage with Request.isUserInRole().\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.25 through 9.0.120.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.46 through 8.5.100, from 7.0.97 through 7.0.109. Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.","published":"2026-08-25T21:55:16.928Z","modified":"2026-08-28T16:55:36.123740835Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/08/26/6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66422.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/j5plylz1b2vhqvbkqn7k58nygxhcpk73"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66422"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-28T16:55:36.123740835Z"}}