Loop with Unreachable Exit Condition ('Infinite Loop') Affecting haproxy package, versions <3.2.26-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.81% (57th percentile)

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  • Snyk IDSNYK-DEBIAN14-HAPROXY-21716835
  • published26 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-110354  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Debian:14 haproxy to version 3.2.26-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream haproxy package and not the haproxy package as distributed by Debian. See How to fix? for Debian:14 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1