Improper Handling of Length Parameter Inconsistency Affecting haproxy package, versions <3.2.15+git64.0fc44b458-160000.2.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.31% (24th percentile)

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  • Snyk IDSNYK-SLES1600-HAPROXY-16332842
  • published1 May 2026
  • disclosed23 Apr 2026

Introduced: 23 Apr 2026

CVE-2026-33555  (opens in a new tab)
CWE-130  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 haproxy to version 3.2.15+git64.0fc44b458-160000.2.1 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 SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

An issue was discovered in HAProxy before 3.3.6. The HTTP/3 parser does not check that the received body length matches a previously announced content-length when the stream is closed via a frame with an empty payload. This can cause desynchronization issues with the backend server and could be used for request smuggling. The earliest affected version is 2.6.

CVSS Base Scores

version 3.1