CVE-2026-33526

Published: Mar 26, 2026 Last Modified: Mar 26, 2026
ExploitDB:
Other exploit source:
Google Dorks:
CRITICAL 9,2
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A

Description

AI Translation Available

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.

416

Use After Free

Stable
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Confidentiality
Potential Impacts:
Modify Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands
Applicable Platforms
Languages: C, C++, Memory-Unsafe
Likelihood of Exploit: High
View CWE Details
826

Premature Release of Resource During Expected Lifetime

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Availability Integrity
Potential Impacts:
Read Application Data Read Memory Dos: Crash, Exit, Or Restart Execute Unauthorized Code Or Commands Modify Application Data Modify Memory
Applicable Platforms
All platforms may be affected
View CWE Details
http://www.openwall.com/lists/oss-security/2026/03/25/2
http://www.openwall.com/lists/oss-security/2026/03/25/2
https://github.com/squid-cache/squid/commit/8a7d42f9d44befb…
https://github.com/squid-cache/squid/commit/8a7d42f9d44befb8fcbbb619505587c8de6…
https://github.com/squid-cache/squid/security/advisories/GH…
https://github.com/squid-cache/squid/security/advisories/GHSA-hpfx-h48q-gvwg