High 8.7Published Mar 25, 2026

CVE-2026-32748Squid has Denial of Service in ICP Response handling

Updated under an hour ago (Oct 27, 2026, 10:00 AM ET)

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It affects squid-cache squid and 9 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for squid-cache squid

Exploited in the last 30 days

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 `icp_port`). This problem _cannot_ be mitigated by denying ICP queries using `icp_access` rules. This bug is fixed in Squid version 7.5.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-413, CWE-416, CWE-826
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

squid-cache squid squid_cache:squid (from the name)	before 7.5	CNA record
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	from 7:6.10-6.el10_1.3 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus	from 7:6.10-5.el10_0.2 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support redhat:rhel_els	from 7:3.5.20-17.el7_9.16 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support redhat:rhel_aus	from 8040020260514123440.522a0ee4 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On redhat:rhel_eus_long_life	from 8040020260514123440.522a0ee4 not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service redhat:rhel_tus	from 8060020260518090356.ad008a3a not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions redhat:rhel_e4s	from 8060020260518090356.ad008a3a not affected	CISA ADP
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support redhat:rhel_eus	from 7:5.5-13.el9_4.5 not affected	CISA ADP
squid-cache squid squid-cache:squid	before 7.5	NVD

References

References

https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq	x-refsource-confirm, mitigation, patch, vendor-advisory
https://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b	x-refsource-misc, patch
http://www.openwall.com/lists/oss-security/2026/03/25/3	mailing-list, mitigation, patch, third-party-advisory
https://access.redhat.com/errata/RHSA-2026:10255
https://access.redhat.com/errata/RHSA-2026:10256
https://access.redhat.com/errata/RHSA-2026:10257
https://access.redhat.com/errata/RHSA-2026:11901
https://access.redhat.com/errata/RHSA-2026:20564
https://access.redhat.com/errata/RHSA-2026:20565
https://access.redhat.com/errata/RHSA-2026:20580
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.