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8.6 High

CVE-2023-49288 Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more

Description

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Affected versions of squid are subject to a a Use-After-Free bug which can lead to a Denial of Service attack via collapsed forwarding. All versions of Squid from 3.5 up to and including 5.9 configured with "collapsed_forwarding on" are vulnerable. Configurations with "collapsed_forwarding off" or without a "collapsed_forwarding" directive are not vulnerable. This bug is fixed by Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should remove all collapsed_forwarding lines from their squid.conf.

Affected products and versions

Product Affected versions Fixed in
squid 3.5 3.5 → < 6.0.1 6.0.1

References

Timeline

  1. Published
  2. Last modified

Other CVEs of squid

The 19 CVEs of squid →
CVE-2026-61642 Squid is a caching proxy for the Web 7.7 High CVE-2026-47729 Squid is a caching proxy for the Web 6.5 Medium CVE-2026-50012 Squid is a caching proxy for the Web 5.5 Medium CVE-2026-33526 Squid is a caching proxy for the Web 9.2 Critical
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