{"id":"BIT-tomcat-2026-77762","summary":"Apache Tomcat: Stale HPACK emitter injects trailers into recycled pooled Request","details":"Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat allows an attacker to inject trailer fields into another HTTP/2 request.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0 through 11.0.25, from 10.1.0 through 10.1.59, from 9.0.39 through 9.0.121.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.59 through 8.5.100. Other unsupported versions may also be affected.\n\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fix the issue.","aliases":["CVE-2026-77762"],"modified":"2026-10-01T10:00:17.532380634Z","published":"2026-10-01T09:36:28.552Z","database_specific":{"cpes":["cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*","cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/09/23/23"},{"type":"WEB","url":"https://lists.apache.org/thread/y5r9fvjo7ol24mkoyoc0st8bqrfyqcyn"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77762"}],"affected":[{"package":{"name":"tomcat","ecosystem":"Bitnami","purl":"pkg:bitnami/tomcat"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.56.59"},{"fixed":"9.0.122"},{"introduced":"10.1.0"},{"fixed":"10.1.60"},{"introduced":"11.0.0"},{"fixed":"11.0.26"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/tomcat/BIT-tomcat-2026-77762.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}],"schema_version":"1.9.0"}