Improper Input Validation Affecting squid package, versions <2.7.STABLE3-4.1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
71.99% (100th percentile)

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  • Snyk IDSNYK-ECHOLATEST-SQUID-18291651
  • published24 Jul 2026
  • disclosed8 Feb 2009

Introduced: 8 Feb 2009

CVE-2009-0478  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Echo:latest squid to version 2.7.STABLE3-4.1 or higher.

NVD Description

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

Squid 2.7 to 2.7.STABLE5, 3.0 to 3.0.STABLE12, and 3.1 to 3.1.0.4 allows remote attackers to cause a denial of service via an HTTP request with an invalid version number, which triggers a reachable assertion in (1) HttpMsg.c and (2) HttpStatusLine.c.

CVSS Base Scores

version 3.1