CVE-2026-32748 is a high-severity Denial of Service vulnerability affecting Squid caching proxy versions prior to 7.5, caused by premature resource release and heap Use-After-Free bugs. This flaw allows a remote, unauthenticated attacker to perform a reliable and repeatable DoS attack by sending specially crafted ICP traffic, specifically impacting Squid deployments with explicitly enabled ICP support. Rated 7.5 on CVSS, the vulnerability has low attack complexity and cannot be mitigated by ICP access rules. There is currently no evidence of active exploitation, and public exploit code or KEV entries are unavailable, though it has garnered some community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 7.5CPE matchmatch criteria | cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.