{"id":"CVE-2026-78437","title":"Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 …","summary":"Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 …","severity":"none","cwe":["CWE-459"],"vendor":"Apache Software Foundation","product":"Apache Tomcat","affected":["apache_tomcat >= 11.0.19 <= 11.0.25","apache_tomcat >= 10.1.53 <= 10.1.59","apache_tomcat >= 9.0.116 <= 9.0.121"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T12:17:07.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78437","references":[{"url":"https://lists.apache.org/thread/qkmsos3s8chn5053qr466rzwv6sk5gjg","label":"security@apache.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-23T12:24:04.184Z","slug":"CVE-2026-78437","body":"## Overview\n\nIncomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}