PT-2026-28159 · Squid+4 · Squid+5

CVE-2026-32748 · Published 2026-01-01 · Updated 2026-07-06

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

Name of the Vulnerable Software and Affected Versions Squid versions prior to 7.5

Description A flaw exists in the handling of Internet Cache Protocol (ICP) traffic. Due to premature resource release and heap Use-After-Free bugs (where the program continues to use a memory address after it has been freed), a remote attacker can send specially crafted ICP traffic to cause a denial of service or potentially obtain small amounts of sensitive information. This issue specifically affects deployments where ICP support is explicitly enabled by configuring a non-zero icp port. This cannot be mitigated by using icp access rules.

Recommendations Update to version 7.5. As a temporary mitigation, disable ICP support by setting the icp port to zero.

Exploit

Fix

DoS

Use After Free

Weakness Enumeration

CWE-826

CWE-413

CWE-416

Related Identifiers

ALSA-2026:6301

ALSA-2026:8119

ALSA-2026:8317

BDU:2026-07191

CVE-2026-32748

GHSA-F9P7-3JQG-HHVQ

MGASA-2026-0094

RHSA-2026:10255

RHSA-2026:10256

RHSA-2026:10257

RHSA-2026:11901

RHSA-2026:20564

RHSA-2026:20565

RHSA-2026:20580

RHSA-2026:6301

RHSA-2026:8119

RHSA-2026:8317

RHSA-2026:8880

RHSA-2026:9220

USN-8157-1

Affected Products

Linuxmint

Red Os

Rocky Linux

Squid

Squid Cache

Ubuntu

References · 62

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32748.json · Exploit
• https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq · Vendor Advisory
• https://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b · Patch
• https://osv.dev/vulnerability/MGASA-2026-0094 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2026-8317.html · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:10257 · Vendor Advisory
• http://openwall.com/lists/oss-security/2026/03/25/3 · Patch
• https://osv.dev/vulnerability/ALSA-2026:8119 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:8317 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-33526 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:8119 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-33515 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-32748 · Security Note
• https://access.redhat.com/errata/RHSA-2026:6301 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:20564 · Vendor Advisory