Cloudanix VulnDB

CVE-2026-110354

High · 7.5

CVSS

7.5

EPSS

0.8%

Published

Oct 22, 2026

CISA due date

—

The record

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.

Affected packages

Ecosystem Package Introduced Fixed

Related vulnerabilities