Unchecked Return Value Affecting haproxy package, versions [3.2.0,3.2.12)[3.3.0,3.3.3)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.55% (44th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-UNMANAGED-HAPROXY-18184438
  • published22 Jul 2026
  • disclosed20 Jul 2026
  • creditUnknown

Introduced: 20 Jul 2026

CVE-2026-26080  (opens in a new tab)
CWE-252  (opens in a new tab)

How to fix?

Upgrade haproxy to version 3.2.12, 3.3.3 or higher.

Overview

Affected versions of this package are vulnerable to Unchecked Return Value due to improper handling of the varint process. An attacker can cause the application to enter an infinite loop or crash by sending specially crafted input.

References

CVSS Base Scores

version 4.0
version 3.1