CVE-2026-32748
Squid has Denial of Service in ICP Response handling
CVE-2026-32748 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2026-32748, released March 26, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.5
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0907
95th percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libecap · RHEL 8 | 0:1.0.1-2.module+el8.9.0+19703+a1da7223 | RHSA-2026:8317 | Apr 30, 2026 |
| libecap · almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2026:8317 | Apr 15, 2026 |
| libecap · ol 8 | 0:1.0.1-2.module+el8.9.0+90083+f7556140 | ELSA-2026-8317 | Apr 16, 2026 |
| libecap · rocky 8 | 0:1.0.1-2.module+el8.9.0+1437+df5ea8f0 | RLSA-2026:8317 | Apr 16, 2026 |
| libecap-devel · RHEL 8 | 0:1.0.1-2.module+el8.9.0+19703+a1da7223 | RHSA-2026:8317 | Apr 30, 2026 |
| libecap-devel · almalinux 8 | 1.0.1-2.module_el8.6.0+2741+01592ae8 | ALSA-2026:8317 | Apr 15, 2026 |
| libecap-devel · ol 8 | 0:1.0.1-2.module+el8.9.0+90083+f7556140 | ELSA-2026-8317 | Apr 16, 2026 |
| squid · Debian 13.5 (trixie) | 6.13-2+deb13u3 | DEBIAN-CVE-2026-32748 | Mar 26, 2026 |
| squid · Debian 14 | 7.5-1 | DEBIAN-CVE-2026-32748 | Mar 26, 2026 |
| squid · Fedora 43 | 7:7.5-1.fc43 | FEDORA-2026-E6A4814A4D | Apr 27, 2026 |
| squid · RHEL 10 | 6.10-5.el10_0.2 | RHSA-2026:11901 | Apr 15, 2026 |
| squid · RHEL 8 | 7:4.15-10.module+el8.10.0+24189+04a20c8a.11 | RHSA-2026:8317 | Apr 30, 2026 |
| squid · RHEL 9 | 7:5.5-22.el9_7.4 | RHSA-2026:6301 | Apr 15, 2026 |
| squid · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | squid 3.5.27-1ubuntu1.14+esm6 | Oct 24, 2026 |
| squid · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.13+esm3 | squid 4.10-1ubuntu1.13+esm3 | Oct 24, 2026 |
| squid · Ubuntu 22.04.1 LTS (jammy) | 5.9-0ubuntu0.22.04.5 | squid 5.9-0ubuntu0.22.04.5 | Apr 15, 2026 |
| squid · Ubuntu 24.04.5 LTS (noble) | 6.14-0ubuntu0.24.04.2 | squid 6.14-0ubuntu0.24.04.2 | Apr 15, 2026 |
| squid · Ubuntu 25.10 (questing) | 6.14-0ubuntu0.25.10.2 | squid 6.14-0ubuntu0.25.10.2 | Apr 15, 2026 |
| squid · almalinux 10 | 7:6.10-6.el10_1.3 | ALSA-2026:8119 | Apr 14, 2026 |
| squid · almalinux 8 | 7:4.15-10.module_el8.10.0+4163+e77fcdac.11 | ALSA-2026:8317 | Apr 15, 2026 |
| squid · almalinux 9 | 7:5.5-22.el9_7.4 | ALSA-2026:6301 | Mar 31, 2026 |
| squid · amzn 2023 | 7:6.13-1.amzn2023.0.4 | ALAS2023-2026-1569 | Apr 13, 2026 |
| squid · ol 10 | 7:6.10-6.el10_1.3 | ELSA-2026-8119 | Apr 14, 2026 |
| squid · ol 8 | 7:4.15-10.module+el8.10.0+90877+04e4d7e0.11 | ELSA-2026-8317 | Apr 16, 2026 |
| squid · ol 9 | 7:5.5-22.el9_7.4 | ELSA-2026-6301 | Mar 31, 2026 |
| squid · opensuse-leap 16.0 | 6.14-160000.1.1 | OPENSUSE-SU-2026:22080-1 | Nov 7, 2026 |
| squid · rocky 10 | 7:6.10-6.el10_1.3 | RLSA-2026:8119 | Apr 15, 2026 |
| squid · rocky 8 | 7:4.15-10.module+el8.10.0+1928+e8441768.5 | RLSA-2026:8317 | Apr 16, 2026 |
| squid · rocky 9 | 7:5.5-22.el9_7.4 | RLSA-2026:6301 | Apr 7, 2026 |
| squid · sles 15.6 | 6.14-150600.3.20.1 | SUSE-SU-2026:4621-1 | Nov 7, 2026 |
| squid · sles 15.7 | 6.14-150600.3.20.1 | SUSE-SU-2026:4621-1 | Nov 7, 2026 |
| squid · sles 16.0 | 6.14-160000.1.1 | SUSE-SU-2026:24224-1 | Nov 7, 2026 |
| squid-cgi · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | squid-cgi 3.5.27-1ubuntu1.14+esm6 | Oct 24, 2026 |
| squid-cgi · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.13+esm3 | squid-cgi 4.10-1ubuntu1.13+esm3 | Oct 24, 2026 |
| squid-cgi · Ubuntu 22.04.1 LTS (jammy) | 5.9-0ubuntu0.22.04.5 | squid-cgi 5.9-0ubuntu0.22.04.5 | Apr 15, 2026 |
| squid-cgi · Ubuntu 24.04.5 LTS (noble) | 6.14-0ubuntu0.24.04.2 | squid-cgi 6.14-0ubuntu0.24.04.2 | Apr 15, 2026 |
| squid-cgi · Ubuntu 25.10 (questing) | 6.14-0ubuntu0.25.10.2 | squid-cgi 6.14-0ubuntu0.25.10.2 | Apr 15, 2026 |
| squid-common · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | squid-common 3.5.27-1ubuntu1.14+esm6 | Oct 24, 2026 |
| squid-common · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.13+esm3 | squid-common 4.10-1ubuntu1.13+esm3 | Oct 24, 2026 |
| squid-common · Ubuntu 22.04.1 LTS (jammy) | 5.9-0ubuntu0.22.04.5 | squid-common 5.9-0ubuntu0.22.04.5 | Apr 15, 2026 |
| squid-common · Ubuntu 24.04.5 LTS (noble) | 6.14-0ubuntu0.24.04.2 | squid-common 6.14-0ubuntu0.24.04.2 | Apr 15, 2026 |
| squid-common · Ubuntu 25.10 (questing) | 6.14-0ubuntu0.25.10.2 | squid-common 6.14-0ubuntu0.25.10.2 | Apr 15, 2026 |
| squid-debuginfo · Fedora 43 | 7:7.5-1.fc43 | FEDORA-2026-E6A4814A4D | Apr 27, 2026 |
| squid-debuginfo · amzn 2023 | 7:6.13-1.amzn2023.0.4 | ALAS2023-2026-1569 | Apr 13, 2026 |
| squid-debugsource · Fedora 43 | 7:7.5-1.fc43 | FEDORA-2026-E6A4814A4D | Apr 27, 2026 |
| squid-debugsource · amzn 2023 | 7:6.13-1.amzn2023.0.4 | ALAS2023-2026-1569 | Apr 13, 2026 |
| squid-openssl · Ubuntu 22.04.1 LTS (jammy) | 5.9-0ubuntu0.22.04.5 | squid-openssl 5.9-0ubuntu0.22.04.5 | Apr 15, 2026 |
| squid-openssl · Ubuntu 24.04.5 LTS (noble) | 6.14-0ubuntu0.24.04.2 | squid-openssl 6.14-0ubuntu0.24.04.2 | Apr 15, 2026 |
| squid-openssl · Ubuntu 25.10 (questing) | 6.14-0ubuntu0.25.10.2 | squid-openssl 6.14-0ubuntu0.25.10.2 | Apr 15, 2026 |
| squid-purge · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | squid-purge 3.5.27-1ubuntu1.14+esm6 | Oct 24, 2026 |
| squid-purge · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.13+esm3 | squid-purge 4.10-1ubuntu1.13+esm3 | Oct 24, 2026 |
| squid-purge · Ubuntu 22.04.1 LTS (jammy) | 5.9-0ubuntu0.22.04.5 | squid-purge 5.9-0ubuntu0.22.04.5 | Apr 15, 2026 |
| squid-purge · Ubuntu 24.04.5 LTS (noble) | 6.14-0ubuntu0.24.04.2 | squid-purge 6.14-0ubuntu0.24.04.2 | Apr 15, 2026 |
| squid-purge · Ubuntu 25.10 (questing) | 6.14-0ubuntu0.25.10.2 | squid-purge 6.14-0ubuntu0.25.10.2 | Apr 15, 2026 |
| squid3 · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | squid3 3.5.27-1ubuntu1.14+esm6 | Oct 24, 2026 |
| squidclient · Ubuntu 18.04.6 LTS (bionic) | 3.5.27-1ubuntu1.14+esm6 | squidclient 3.5.27-1ubuntu1.14+esm6 | Oct 24, 2026 |
| squidclient · Ubuntu 20.04 LTS (focal) | 4.10-1ubuntu1.13+esm3 | squidclient 4.10-1ubuntu1.13+esm3 | Oct 24, 2026 |
| squidclient · Ubuntu 22.04.1 LTS (jammy) | 5.9-0ubuntu0.22.04.5 | squidclient 5.9-0ubuntu0.22.04.5 | Apr 15, 2026 |
| squidclient · Ubuntu 24.04.5 LTS (noble) | 6.14-0ubuntu0.24.04.2 | squidclient 6.14-0ubuntu0.24.04.2 | Apr 15, 2026 |
| squidclient · Ubuntu 25.10 (questing) | 6.14-0ubuntu0.25.10.2 | squidclient 6.14-0ubuntu0.25.10.2 | Apr 15, 2026 |
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