UpHeron
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Servers and applications

CVE-2020-25097

SQUID-2020:11 HTTP Request Smuggling

Severity
High 8.6
Published
4 Mar 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.14, 5.0.5
Also known as
GHSA-jvf6-h9gj-pmj6
Sources
NVD, Project advisories (GitHub)

Description

An issue was discovered in Squid through 4.13 and 5.x through 5.0.4. Due to improper input validation, it allows a trusted client to perform HTTP Request Smuggling and access services otherwise forbidden by the security controls. This occurs for certain uri_whitespace configuration settings.

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • From 2.0 before 4.14
  • From 5.0.1 before 5.0.5
SquidServers and applications · github:squid-cache/squid
  • From 5.0.1 before 5.0.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-25097
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-25097
  • GitHub Advisory Database https://github.com/advisories/GHSA-jvf6-h9gj-pmj6
  • github.com https://github.com/squid-cache/squid/security/advisories/GHSA-jvf6-h9gj-pmj6