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Authentication vulnerability in Apache Tomcat allowed a replay attack against the EncryptionInterceptor in the cluster component.\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.13 through 9.0.118, from 8.5.38 through 8.5.100, from 7.0.100 through 7.0.109.\n\nUsers are recommended to upgrade to version 11.0.23, 10.1.56, 9.0.119, which fixes the issue.","id":"GHSA-c5ph-rghf-fjfj","modified":"2026-11-04T16:55:34.284151455Z","published":"2026-06-29T21:32:15Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55955"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/3a9ff01d2dfaca651edacbda3260e37b98b540d3"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/5e594400c7f6ac0eaf2526bd64442a70f5ccaace"},{"type":"WEB","url":"https://github.com/apache/tomcat/commit/6a7a432cd7fb4ef358dc12e8da99cf3ab320f3fe"},{"type":"PACKAGE","url":"https://github.com/apache/tomcat"},{"type":"WEB","url":"https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106"},{"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"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/29/24"}],"schema_version":"1.9.2","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","type":"CVSS_V3"}],"summary":"Apache Tomcat has an Improper Authentication vulnerability"}