{
  "cveId": "CVE-2026-61642",
  "url": "https://patchblox.com/security/cve/CVE-2026-61642",
  "summary": "CVE-2026-61642 is fixed in 9 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": 0.81233,
  "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": "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": "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": "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-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": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}