{
  "cveId": "CVE-2026-61642",
  "url": "https://patchblox.com/security/cve/CVE-2026-61642",
  "summary": "CVE-2026-61642 is fixed in 11 products on 1 platform, first by DEBIAN-CVE-2026-61642, released September 17, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Squid Request Smuggling in HTTP Transfer-Encoding",
  "description": "Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (\u0060src/HttpHeader.cc\u0060) accepted the bare\u0060 Transfer-Encoding:\u0060 identity form, which the HTTP specification prohibits because any transfer coding must be wrapped within chunked encoding. This problem allows a trusted client to perform an HTTP Request Smuggling attack when HTTP/1.1 is used, bypassing security mechanisms that may be in place between attacker and Squid. When there is an HTTP cache operating prior to the affected Squid, this Request Smuggling attack also allows the attacker to poison that web cache and store arbitrary malicious content at any URL for delivery to other clients\u0027 future requests. This issue is fixed in version 7.6.",
  "published": "2026-09-28T09:00:00Z",
  "severity": "Important",
  "cvss": 7.7,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
  "cwe": "Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
  "epss": 0.02037,
  "epssPercentile": 0.81265,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61642",
  "fixes": [
    {
      "platform": "linux",
      "product": "libecap",
      "release": "RHEL 8",
      "fixedVersion": "0:1.0.1-2.module\u002Bel8.9.0\u002B19703\u002Ba1da7223",
      "fix": "RHSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-96078",
      "released": "2026-11-10T03:14:07Z"
    },
    {
      "platform": "linux",
      "product": "libecap",
      "release": "almalinux 8",
      "fixedVersion": "1.0.1-2.module_el8.6.0\u002B2741\u002B01592ae8",
      "fix": "ALSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-96078",
      "released": "2026-11-10T03:16:07Z"
    },
    {
      "platform": "linux",
      "product": "libecap",
      "release": "rocky 8",
      "fixedVersion": "0:1.0.1-2.module\u002Bel8.9.0\u002B1437\u002Bdf5ea8f0",
      "fix": "RLSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-96078",
      "released": "2026-11-10T03:15:52Z"
    },
    {
      "platform": "linux",
      "product": "libecap-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:1.0.1-2.module\u002Bel8.9.0\u002B19703\u002Ba1da7223",
      "fix": "RHSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-96078",
      "released": "2026-11-10T03:14:07Z"
    },
    {
      "platform": "linux",
      "product": "libecap-devel",
      "release": "almalinux 8",
      "fixedVersion": "1.0.1-2.module_el8.6.0\u002B2741\u002B01592ae8",
      "fix": "ALSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-96078",
      "released": "2026-11-10T03:16:07Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.13-2\u002Bdeb13u4",
      "fix": "DEBIAN-CVE-2026-61642",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-61642",
      "released": "2026-09-17T18:08:56Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Debian 14",
      "fixedVersion": "7.6-1",
      "fix": "DEBIAN-CVE-2026-61642",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-61642",
      "released": "2026-09-17T18:08:56Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "RHEL 8",
      "fixedVersion": "7:4.15-10.module\u002Bel8.10.0\u002B25179\u002B3c013c36.13",
      "fix": "RHSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-96078",
      "released": "2026-11-10T03:14:07Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.5.27-1ubuntu1.14\u002Besm6",
      "fix": "squid 3.5.27-1ubuntu1.14\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-squid-3.5.27-1ubuntu1.14-esm6",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.10-1ubuntu1.13\u002Besm3",
      "fix": "squid 4.10-1ubuntu1.13\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-squid-4.10-1ubuntu1.13-esm3",
      "released": "2026-10-24T13:26:08Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "5.9-0ubuntu0.22.04.8",
      "fix": "squid 5.9-0ubuntu0.22.04.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-squid-5.9-0ubuntu0.22.04.8",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.14-0ubuntu0.24.04.5",
      "fix": "squid 6.14-0ubuntu0.24.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-squid-6.14-0ubuntu0.24.04.5",
      "released": "2026-10-24T13:26:14Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "7.7-0ubuntu0.26.04.2",
      "fix": "squid 7.7-0ubuntu0.26.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-squid-7.7-0ubuntu0.26.04.2",
      "released": "2026-11-07T00:38:01Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "almalinux 8",
      "fixedVersion": "7:4.15-10.module_el8.10.0\u002B4354\u002Bd3ed158a.13",
      "fix": "ALSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-96078",
      "released": "2026-11-10T03:16:07Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "amzn 2023",
      "fixedVersion": "7:6.13-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3145",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3145",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "squid",
      "release": "rocky 8",
      "fixedVersion": "7:4.15-10.module\u002Bel8.10.0\u002B1985\u002Beaf982f0.6",
      "fix": "RLSA-2026:96078",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-96078",
      "released": "2026-11-10T03:15:52Z"
    },
    {
      "platform": "linux",
      "product": "squid-cgi",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.5.27-1ubuntu1.14\u002Besm6",
      "fix": "squid-cgi 3.5.27-1ubuntu1.14\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-squid-cgi-3.5.27-1ubuntu1.14-esm6",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "squid-cgi",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.10-1ubuntu1.13\u002Besm3",
      "fix": "squid-cgi 4.10-1ubuntu1.13\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-squid-cgi-4.10-1ubuntu1.13-esm3",
      "released": "2026-10-24T13:26:08Z"
    },
    {
      "platform": "linux",
      "product": "squid-cgi",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "5.9-0ubuntu0.22.04.8",
      "fix": "squid-cgi 5.9-0ubuntu0.22.04.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-squid-cgi-5.9-0ubuntu0.22.04.8",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "squid-cgi",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.14-0ubuntu0.24.04.5",
      "fix": "squid-cgi 6.14-0ubuntu0.24.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-squid-cgi-6.14-0ubuntu0.24.04.5",
      "released": "2026-10-24T13:26:14Z"
    },
    {
      "platform": "linux",
      "product": "squid-common",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.5.27-1ubuntu1.14\u002Besm6",
      "fix": "squid-common 3.5.27-1ubuntu1.14\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-squid-common-3.5.27-1ubuntu1.14-esm6",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "squid-common",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.10-1ubuntu1.13\u002Besm3",
      "fix": "squid-common 4.10-1ubuntu1.13\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-squid-common-4.10-1ubuntu1.13-esm3",
      "released": "2026-10-24T13:26:08Z"
    },
    {
      "platform": "linux",
      "product": "squid-common",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "5.9-0ubuntu0.22.04.8",
      "fix": "squid-common 5.9-0ubuntu0.22.04.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-squid-common-5.9-0ubuntu0.22.04.8",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "squid-common",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.14-0ubuntu0.24.04.5",
      "fix": "squid-common 6.14-0ubuntu0.24.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-squid-common-6.14-0ubuntu0.24.04.5",
      "released": "2026-10-24T13:26:14Z"
    },
    {
      "platform": "linux",
      "product": "squid-common",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "7.7-0ubuntu0.26.04.2",
      "fix": "squid-common 7.7-0ubuntu0.26.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-squid-common-7.7-0ubuntu0.26.04.2",
      "released": "2026-11-07T00:38:01Z"
    },
    {
      "platform": "linux",
      "product": "squid-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "7:6.13-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3145",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3145",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "squid-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "7:6.13-1.amzn2023.0.6",
      "fix": "ALAS2023-2026-3145",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3145",
      "released": "2026-09-28T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "squid-openssl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "5.9-0ubuntu0.22.04.8",
      "fix": "squid-openssl 5.9-0ubuntu0.22.04.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-squid-openssl-5.9-0ubuntu0.22.04.8",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "squid-openssl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.14-0ubuntu0.24.04.5",
      "fix": "squid-openssl 6.14-0ubuntu0.24.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-squid-openssl-6.14-0ubuntu0.24.04.5",
      "released": "2026-10-24T13:26:14Z"
    },
    {
      "platform": "linux",
      "product": "squid-openssl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "7.7-0ubuntu0.26.04.2",
      "fix": "squid-openssl 7.7-0ubuntu0.26.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-squid-openssl-7.7-0ubuntu0.26.04.2",
      "released": "2026-11-07T00:38:01Z"
    },
    {
      "platform": "linux",
      "product": "squid-purge",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.5.27-1ubuntu1.14\u002Besm6",
      "fix": "squid-purge 3.5.27-1ubuntu1.14\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-squid-purge-3.5.27-1ubuntu1.14-esm6",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "squid-purge",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.10-1ubuntu1.13\u002Besm3",
      "fix": "squid-purge 4.10-1ubuntu1.13\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-squid-purge-4.10-1ubuntu1.13-esm3",
      "released": "2026-10-24T13:26:08Z"
    },
    {
      "platform": "linux",
      "product": "squid-purge",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "5.9-0ubuntu0.22.04.8",
      "fix": "squid-purge 5.9-0ubuntu0.22.04.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-squid-purge-5.9-0ubuntu0.22.04.8",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "squid-purge",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.14-0ubuntu0.24.04.5",
      "fix": "squid-purge 6.14-0ubuntu0.24.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-squid-purge-6.14-0ubuntu0.24.04.5",
      "released": "2026-10-24T13:26:14Z"
    },
    {
      "platform": "linux",
      "product": "squid3",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.5.27-1ubuntu1.14\u002Besm6",
      "fix": "squid3 3.5.27-1ubuntu1.14\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-squid3-3.5.27-1ubuntu1.14-esm6",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "squidclient",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.5.27-1ubuntu1.14\u002Besm6",
      "fix": "squidclient 3.5.27-1ubuntu1.14\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-squidclient-3.5.27-1ubuntu1.14-esm6",
      "released": "2026-10-24T13:26:02Z"
    },
    {
      "platform": "linux",
      "product": "squidclient",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "4.10-1ubuntu1.13\u002Besm3",
      "fix": "squidclient 4.10-1ubuntu1.13\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-squidclient-4.10-1ubuntu1.13-esm3",
      "released": "2026-10-24T13:26:08Z"
    },
    {
      "platform": "linux",
      "product": "squidclient",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "5.9-0ubuntu0.22.04.8",
      "fix": "squidclient 5.9-0ubuntu0.22.04.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-squidclient-5.9-0ubuntu0.22.04.8",
      "released": "2026-10-24T13:26:11Z"
    },
    {
      "platform": "linux",
      "product": "squidclient",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "6.14-0ubuntu0.24.04.5",
      "fix": "squidclient 6.14-0ubuntu0.24.04.5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-squidclient-6.14-0ubuntu0.24.04.5",
      "released": "2026-10-24T13:26:14Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T01:43:54Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}