CVE-2026-32748: Squid has Denial of Service in ICP Response handling
Squid has Denial of Service in ICP Response handling
Other sources
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 icpport). This problem cannot be mitigated by denying ICP queries using icpaccess rules. This bug is fixed in Squid version 7.5.
— NVD
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2026-32748?
CVE-2026-32748 has a high severity rating due to its potential for Denial of Service attacks.
How do I fix CVE-2026-32748?
To mitigate CVE-2026-32748, upgrade Squid to version 7.5 or later.
What causes CVE-2026-32748?
CVE-2026-32748 is caused by premature resource release and heap Use-After-Free bugs when handling ICP traffic.
Who is affected by CVE-2026-32748?
CVE-2026-32748 affects all versions of Squid prior to version 7.5.
What type of vulnerability is CVE-2026-32748?
CVE-2026-32748 is classified as a Denial of Service vulnerability.