#VU124611 Out-of-bounds read in Squid - CVE-2026-33515
Published: March 25, 2026
Vulnerability identifier: #VU124611
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-33515
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Squid
Squid
Software vendor:
Squid-cache.org
Squid-cache.org
Description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to improper input validation in ICP message handling when processing ICP traffic. A remote attacker can send a specially crafted ICP request to disclose small amounts of memory potentially containing sensitive information.
The attack is limited to Squid deployments that explicitly enable ICP support (i.e., configure a non-zero icp_port).
Remediation
Install security update from vendor's website.