Improper Handling of Length Parameter Inconsistency Affecting haproxy-3.3-doc package, versions <3.3.6-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.31% (24th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-HAPROXY33DOC-17741441
  • published1 Jul 2026
  • disclosed13 Apr 2026

Introduced: 13 Apr 2026

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

How to fix?

Upgrade Minimos:latest haproxy-3.3-doc to version 3.3.6-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream haproxy-3.3-doc package and not the haproxy-3.3-doc package as distributed by Minimos. See How to fix? for Minimos:latest 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