{"id":"CVE-2026-55955","title":"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,…","summary":"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,…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-287"],"vendor":"apache","product":"tomcat","affected":["tomcat < 9.0.19","tomcat >= 10.1.0, < 10.1.56","tomcat >= 11.0.0, < 11.0.23"],"patched":["tomcat 11.0.23"],"published":"2026-06-29","updated":"2026-07-02","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55955","references":[{"url":"https://lists.apache.org/thread/g4p5sf45p3f9r011pwqs9r54yd64s106","label":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/06/29/24","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00436,"epssPercentile":0.37391,"ingestedAt":"2026-07-03T13:02:28.104Z","slug":"CVE-2026-55955","body":"## Overview\n\nImproper 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.\n\n## Affected\n\n- `tomcat < 9.0.19`\n- `tomcat >= 10.1.0, < 10.1.56`\n- `tomcat >= 11.0.0, < 11.0.23`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `tomcat 11.0.23`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}