{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-32748","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-13T18:53:03.531Z","datePublished":"2026-03-26T00:11:01.424Z","dateUpdated":"2026-06-30T12:07:41.435Z"},"containers":{"cna":{"title":"Squid has Denial of Service in ICP Response handling","problemTypes":[{"descriptions":[{"cweId":"CWE-413","lang":"en","description":"CWE-413: Improper Resource Locking","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416: Use After Free","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-826","lang":"en","description":"CWE-826: Premature Release of Resource During Expected Lifetime","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"LOW","baseScore":8.7,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq"},{"name":"https://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b","tags":["x_refsource_MISC"],"url":"https://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b"}],"affected":[{"vendor":"squid-cache","product":"squid","versions":[{"version":"< 7.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-26T00:11:01.424Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-f9p7-3jqg-hhvq","discovery":"UNKNOWN"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/03/25/3"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-03-26T00:24:52.135Z"}},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-26T14:19:13.990996Z","id":"CVE-2026-32748","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-26T15:02:31.962Z"}},{"affected":[{"cpes":["cpe:/o:redhat:rhel_els:7"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux Server (v. 7 ELS)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS (v. 10.0)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:10.1"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 10)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream AUS (v.8.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream AUS (v.8.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:8.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.8.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_tus:8.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream TUS (v.8.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.8.8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_tus:8.8::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream TUS (v.8.8)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:9.0::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.9.0)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream E4S (v.9.2)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus:9.4::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS (v.9.4)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream EUS (v.9.6)","vendor":"Red Hat"},{"cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux AppStream (v. 9)","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"},{"cpes":["cpe:/o:redhat:rhel_els:7"],"defaultStatus":"unaffected","product":"Red Hat Enterprise Linux Server Optional (v. 7 ELS)","vendor":"Red Hat"}],"datePublic":"2026-03-26T00:11:01.424Z","descriptions":[{"lang":"en","value":"A flaw was found in Squid. A remote attacker can exploit this vulnerability by sending specially crafted ICP (Internet Cache Protocol) traffic. This can lead to a Denial of Service (DoS) due to premature resource release and use-after-free vulnerabilities. This attack is possible in Squid deployments with explicitly enabled ICP support."}],"metrics":[{"other":{"content":{"namespace":"https://access.redhat.com/security/updates/classification/","value":"Important"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-826","description":"Premature Release of Resource During Expected Lifetime","lang":"en","type":"CWE"}]}],"references":[{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-32748"},{"name":"RHBZ#2451577","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451577"},{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32748.json"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8880"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:11901"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8119"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:8317"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20564"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20565"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:20580"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10256"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10257"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10255"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:9220"},{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:6301"}],"solutions":[{"lang":"en","value":"RHSA-2026:8880: Red Hat Enterprise Linux Server (v. 7 ELS)"},{"lang":"en","value":"RHSA-2026:11901: Red Hat Enterprise Linux AppStream EUS (v. 10.0)"},{"lang":"en","value":"RHSA-2026:8119: Red Hat Enterprise Linux AppStream (v. 10)"},{"lang":"en","value":"RHSA-2026:8317: Red Hat Enterprise Linux AppStream (v. 8)"},{"lang":"en","value":"RHSA-2026:20564: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"},{"lang":"en","value":"RHSA-2026:20565: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.6)"},{"lang":"en","value":"RHSA-2026:20580: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"},{"lang":"en","value":"RHSA-2026:10256: Red Hat Enterprise Linux AppStream E4S (v.9.0)"},{"lang":"en","value":"RHSA-2026:10257: Red Hat Enterprise Linux AppStream E4S (v.9.2)"},{"lang":"en","value":"RHSA-2026:10255: Red Hat Enterprise Linux AppStream EUS (v.9.4)"},{"lang":"en","value":"RHSA-2026:9220: Red Hat Enterprise Linux AppStream EUS (v.9.6)"},{"lang":"en","value":"RHSA-2026:6301: Red Hat Enterprise Linux AppStream (v. 9)"}],"timeline":[{"lang":"en","time":"2026-03-26T01:01:29.920Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-03-26T00:11:01.424Z","value":"Made public."}],"title":"Squid: Squid: Denial of Service via crafted ICP traffic","workarounds":[{"lang":"en","value":"To mitigate this issue, ensure that ICP support is not explicitly enabled in the Squid configuration. This can be achieved by commenting out or setting `icp_port` to `0` in the `squid.conf` file. After modifying the configuration, the Squid service must be reloaded or restarted for the changes to take effect.\n\nExample:\n```\n# icp_port 3130\n```\nor\n```\nicp_port 0\n```\nWarning: Reloading or restarting the Squid service may temporarily interrupt proxy services."}],"x_adpType":"supplier","x_generator":{"engine":"sadp-cli 1.0.0"},"providerMetadata":{"orgId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","shortName":"redhat-SADP","dateUpdated":"2026-06-30T12:07:41.435Z"}}]}}