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CVE PROGRAM SOURCE RECORD9.2 Critical

CVE-2026-33526

Squid vulnerable to Denial of Service in ICP Request handling

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

squid-cache squid

  • < 7.5affected

References