{"id":"CVE-2026-111805","title":"Apache Traffic Server: HTTP/2 Content-Length truncation lets a client trigger backend worker-pool exhaustion","summary":"Apache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a truncated HTTP/2 Content-Length value.\n\n\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 thr…","severity":"high","cvss":8.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-400"],"vendor":"Apache Software Foundation","product":"Apache Traffic Server","affected":["apache_traffic_server >= 8.0.0 <= 8.1.11","apache_traffic_server >= 9.0.0 <= 9.2.15","apache_traffic_server >= 10.0.0 <= 10.1.4","apache_traffic_server 10.2.0"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T19:10:46.319Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111805","references":[{"url":"https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T20:11:44.912Z","slug":"CVE-2026-111805","body":"## Overview\n\nApache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a truncated HTTP/2 Content-Length value.\n\n\n\nThis issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0.\n\n\n\nUsers are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.\n\n## Affected\n\n- `apache_traffic_server >= 8.0.0 <= 8.1.11`\n- `apache_traffic_server >= 9.0.0 <= 9.2.15`\n- `apache_traffic_server >= 10.0.0 <= 10.1.4`\n- `apache_traffic_server 10.2.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":47.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}