{"id":"CVE-2026-55955","summary":"Apache Tomcat: EncryptInterceptor not protected against replay attacks","details":"Improper 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 9.0.18, 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.","aliases":["BIT-tomcat-2026-55955","GHSA-c5ph-rghf-fjfj"],"modified":"2026-11-04T16:55:54.436860691Z","published":"2026-06-29T20:44:39.779Z","related":["ALSA-2026:68651","ALSA-2026:68660","ALSA-2026:68677","SUSE-SU-2026:22646-1","SUSE-SU-2026:22647-1","SUSE-SU-2026:22648-1","SUSE-SU-2026:3087-1","SUSE-SU-2026:3088-1","SUSE-SU-2026:3112-1","SUSE-SU-2026:3167-1","openSUSE-SU-2026:11195-1","openSUSE-SU-2026:11208-1","openSUSE-SU-2026:11209-1","openSUSE-SU-2026:21327-1","openSUSE-SU-2026:21328-1","openSUSE-SU-2026:21329-1"],"database_specific":{"cwe_ids":["CWE-287"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55955.json","unresolved_ranges":[{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"11.0.0-M1"},{"last_affected":"11.0.22"},{"introduced":"10.1.0-M1"},{"last_affected":"10.1.55"},{"introduced":"9.0.13"},{"last_affected":"9.0.118"},{"introduced":"8.5.38"},{"last_affected":"8.5.100"},{"introduced":"7.0.100"},{"last_affected":"7.0.109"}],"source":"AFFECTED_FIELD"}]}],"cna_assigner":"apache"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/29/24"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55955.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55955"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/tomcat","events":[{"introduced":"0"},{"fixed":"36c2e40f60e3176f12c0344f40f656251448b004"},{"introduced":"e9d17cddc285615807ec5fef09240777436b25dc"},{"fixed":"59f3f1ab4f905f94c9c99cad579d6afb3a935b66"},{"introduced":"56e547d387ab49f688c93fe9ca082b1b5d94deed"},{"fixed":"b5c1bba61f2e54875bd6d538ae145fffd7b217a8"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"9.0.119"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*"},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*","range":[{"introduced":"10.1.0"},{"fixed":"10.1.56"}]},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*","range":[{"introduced":"11.0.0"},{"fixed":"11.0.23"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-55955.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}