Description

Squid is a caching proxy for the Web. Prior to version 7.5, due to heap Use-After-Free, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. Version 7.5 contains a patch.

INFO

Published Date :

2026-03-26T00:16:12.195Z

Last Modified :

2026-03-26T18:20:40.309Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-33526 vulnerability.

Vendors Products
Squid-cache
  • Squid
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-33526.

URL Resource
http://www.openwall.com/lists/oss-security/2026/03/25/2 cve-icon cve-icon
https://github.com/squid-cache/squid/commit/8a7d42f9d44befb8fcbbb619505587c8de6a1e91 cve-icon cve-icon cve-icon
https://github.com/squid-cache/squid/security/advisories/GHSA-hpfx-h48q-gvwg cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-33526 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-33526 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Privileges Required
User Interaction
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SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact