Use After Free in Squid - CVE-2026-32748
Published: March 25, 2026
Vulnerability identifier: #VU124612
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-32748
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Squid-cache.org
Affected software:
Squid
Squid
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to use-after-free in ICP request handling when processing ICP traffic. A remote attacker can send a specially crafted ICP request to cause a denial of service.
The vulnerability is only exploitable on Squid deployments that have ICP support enabled via a non-zero icp_port configuration.
How to mitigate CVE-2026-32748
Install security update from vendor's website.