CVE-2026-110354

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...

CVE-2026-110354

A flaw was found in haproxy. A remote, unauthenticated attacker can trigger a denial of service DoS by sending a specially crafted HTTP/1.1 chunked request. When processing the request, the parser repeatedly re-evaluates the same data without making forward progress, trapping the worker thread in...

CVE-2026-110354

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...

EUVD-2026-108000

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...

CVE-2026-110354

HAProxy 3 versions prior to 3.4.6 are vulnerable to a denial of service (DoS) attack due to persistent worker-thread CPU exhaustion. The root cause involves an HTTP/1.1 chunked request where the parser repeatedly re-processes the same bytes without making progress, even after the H1 multiplexer d...