{"id":"CVE-2026-111817","title":"Apache Traffic Server: Dropping chunked trailers stalls a passthrough transfer until timeout","summary":"Apache Traffic Server can stall a chunked transfer that it passes through with its trailers removed (proxy.config.http.drop_chunked_trailers) until the connection times out, because it waits for the trailer bytes it has already dropped. …","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-400"],"vendor":"Apache Software Foundation","product":"Apache Traffic Server","affected":["apache_traffic_server 8.1.11","apache_traffic_server >= 9.2.5 <= 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":"2026-10-21T19:20:00.515Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111817","references":[{"url":"https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T20:11:44.908Z","slug":"CVE-2026-111817","body":"## Overview\n\nApache Traffic Server can stall a chunked transfer that it passes through with its trailers removed (proxy.config.http.drop_chunked_trailers) until the connection times out, because it waits for the trailer bytes it has already dropped. Trailer dropping is on by default in 10.x. In 8.1.11 and 9.2.x it is off by default, and those versions are affected only if it is enabled.\n\n\n\nThis issue affects Apache Traffic Server: 8.1.11, from 9.2.5 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 10.1.5 or 10.2.1, which fix the issue.\n\n## Affected\n\n- `apache_traffic_server 8.1.11`\n- `apache_traffic_server >= 9.2.5 <= 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":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}