{"id":"DEBIAN-CVE-2026-110354","details":"HAProxy 3 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (persistent worker-thread CPU exhaustion) via an HTTP/1.1 chunked request. Although the H1 multiplexer drains the request before closing the stream, the parser repeatedly re-processes the same bytes without making progress. The affected thread stays busy at 100% CPU after timeouts expire and after the client disconnects, and repeated requests can consume all worker threads until the process is restarted.","modified":"2026-10-26T08:00:08.479646238Z","published":"2026-10-22T03:16:31.427Z","upstream":["CVE-2026-110354"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-110354"}],"affected":[{"package":{"name":"haproxy","ecosystem":"Debian:12","purl":"pkg:deb/debian/haproxy?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.12-1+deb12u4"}]}],"versions":["2.6.12-1","2.6.12-1+deb12u1","2.6.12-1+deb12u2","2.6.12-1+deb12u3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110354.json"}},{"package":{"name":"haproxy","ecosystem":"Debian:13","purl":"pkg:deb/debian/haproxy?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.11-1+deb13u4"}]}],"versions":["3.0.11-1","3.0.11-1+deb13u1","3.0.11-1+deb13u2","3.0.11-1+deb13u3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110354.json"}},{"package":{"name":"haproxy","ecosystem":"Debian:14","purl":"pkg:deb/debian/haproxy?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.26-1"}]}],"versions":["3.0.11-1","3.1.0-1","3.1.0-2","3.1.1-1","3.1.2-1","3.1.3-1","3.1.5-1","3.1.6-1","3.1.7-1","3.2.0-1","3.2.1-1","3.2.10-1","3.2.11-1","3.2.11-2","3.2.12-1","3.2.13-1","3.2.14-1","3.2.15-1","3.2.16-1","3.2.17-1","3.2.18-1","3.2.19-1","3.2.20-1","3.2.21-1","3.2.22-1","3.2.23-1","3.2.24-1","3.2.25-1","3.2.3-1","3.2.3-2","3.2.4-1","3.2.5-1","3.2.5-2","3.2.6-1","3.2.7-1","3.2.8-1","3.2.9-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-110354.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}