{"id":"BIT-tomcat-2026-78437","summary":"Apache Tomcat: HTTP/2 DoS via malformed request","details":"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 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.","aliases":["CVE-2026-78437"],"modified":"2026-10-01T10:00:18.286852819Z","published":"2026-10-01T09:36:32.198Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*","cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/09/23/26"},{"type":"WEB","url":"https://lists.apache.org/thread/qkmsos3s8chn5053qr466rzwv6sk5gjg"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78437"}],"affected":[{"package":{"name":"tomcat","ecosystem":"Bitnami","purl":"pkg:bitnami/tomcat"},"ranges":[{"type":"SEMVER","events":[{"introduced":"9.0.116"},{"fixed":"9.0.122"},{"introduced":"10.1.53"},{"fixed":"10.1.60"},{"introduced":"11.0.19"},{"fixed":"11.0.26"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-78437.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}],"schema_version":"1.9.0"}