CVE-2026-32748

HIGH

7.5

Description

Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expected lifetime and heap Use-After-Free bugs, 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. This bug is fixed in Squid version 7.5.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/26/2026

Last Modified3/26/2026

Sourcenvd

Honeypot Sightings0

Affected Products

squid-cache:squid

Weaknesses (CWE)

CWE-413CWE-416CWE-826

References

https://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b(security-advisories@github.com)

https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq(security-advisories@github.com)

http://www.openwall.com/lists/oss-security/2026/03/25/3(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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