{
  "cveId": "CVE-2026-82209",
  "url": "https://patchblox.com/security/cve/CVE-2026-82209",
  "summary": "CVE-2026-82209 is fixed in 6 products on 1 platform, first by curl 8.18.0-1ubuntu2.7, released September 6, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "domain-scoped PSL domain cookie",
  "description": "When libpsl support is enabled, libcurl fails to enforce the Public Suffix List boundary check when processing a \u0060Set-Cookie\u0060 header where the \u0060Domain\u0060 attribute explicitly matches an origin host that is itself a public suffix (e.g., \u0060Domain=co.uk\u0060 set by \u0060co.uk\u0060).  Instead of coercing it into a strict host-only cookie, libcurl saves the cookie with wildcard domain scope (\u0060.co.uk\u0060). Consequently, the cookie is inappropriately included in subsequent outbound requests or HTTP redirects to arbitrary sibling subdomains under the same public suffix (e.g., \u0060attacker.co.uk\u0060).",
  "published": "2026-09-06T11:17:00Z",
  "severity": "Important",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
  "epss": 0.00373,
  "epssPercentile": 0.31494,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-82209",
  "fixes": [
    {
      "platform": "linux",
      "product": "curl",
      "release": "Debian 14",
      "fixedVersion": "8.22.0-1",
      "fix": "DEBIAN-CVE-2026-82209",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-82209",
      "released": "2026-09-19T18:30:58Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm14",
      "fix": "curl 7.58.0-2ubuntu3.24\u002Besm14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-curl-7.58.0-2ubuntu3.24-esm14",
      "released": "2026-09-28T20:16:28Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.25\u002Besm9",
      "fix": "curl 7.68.0-1ubuntu2.25\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-curl-7.68.0-1ubuntu2.25-esm9",
      "released": "2026-09-28T20:16:30Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.29",
      "fix": "curl 7.81.0-1ubuntu1.29",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-curl-7.81.0-1ubuntu1.29",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "8.5.0-2ubuntu10.15",
      "fix": "curl 8.5.0-2ubuntu10.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-curl-8.5.0-2ubuntu10.15",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.7",
      "fix": "curl 8.18.0-1ubuntu2.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-curl-8.18.0-1ubuntu2.7",
      "released": "2026-09-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "sles 15.6",
      "fixedVersion": "8.22.0-150600.4.58.1",
      "fix": "SUSE-SU-2026:5069-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5069-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "curl",
      "release": "sles 15.7",
      "fixedVersion": "8.22.0-150700.7.33.1",
      "fix": "SUSE-SU-2026:5068-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5068-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-gnutls",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm14",
      "fix": "libcurl3-gnutls 7.58.0-2ubuntu3.24\u002Besm14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl3-gnutls-7.58.0-2ubuntu3.24-esm14",
      "released": "2026-09-28T20:16:28Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-gnutls",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.25\u002Besm9",
      "fix": "libcurl3-gnutls 7.68.0-1ubuntu2.25\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl3-gnutls-7.68.0-1ubuntu2.25-esm9",
      "released": "2026-09-28T20:16:30Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-gnutls",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.29",
      "fix": "libcurl3-gnutls 7.81.0-1ubuntu1.29",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl3-gnutls-7.81.0-1ubuntu1.29",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-nss",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm14",
      "fix": "libcurl3-nss 7.58.0-2ubuntu3.24\u002Besm14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl3-nss-7.58.0-2ubuntu3.24-esm14",
      "released": "2026-09-28T20:16:28Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-nss",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.25\u002Besm9",
      "fix": "libcurl3-nss 7.68.0-1ubuntu2.25\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl3-nss-7.68.0-1ubuntu2.25-esm9",
      "released": "2026-09-28T20:16:30Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3-nss",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.29",
      "fix": "libcurl3-nss 7.81.0-1ubuntu1.29",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl3-nss-7.81.0-1ubuntu1.29",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3t64-gnutls",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "8.5.0-2ubuntu10.15",
      "fix": "libcurl3t64-gnutls 8.5.0-2ubuntu10.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcurl3t64-gnutls-8.5.0-2ubuntu10.15",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3t64-gnutls",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.7",
      "fix": "libcurl3t64-gnutls 8.18.0-1ubuntu2.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcurl3t64-gnutls-8.18.0-1ubuntu2.7",
      "released": "2026-09-06T11:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "7.58.0-2ubuntu3.24\u002Besm14",
      "fix": "libcurl4 7.58.0-2ubuntu3.24\u002Besm14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libcurl4-7.58.0-2ubuntu3.24-esm14",
      "released": "2026-09-28T20:16:28Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "7.68.0-1ubuntu2.25\u002Besm9",
      "fix": "libcurl4 7.68.0-1ubuntu2.25\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libcurl4-7.68.0-1ubuntu2.25-esm9",
      "released": "2026-09-28T20:16:30Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "7.81.0-1ubuntu1.29",
      "fix": "libcurl4 7.81.0-1ubuntu1.29",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libcurl4-7.81.0-1ubuntu1.29",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "8.5.0-2ubuntu10.15",
      "fix": "libcurl4t64 8.5.0-2ubuntu10.15",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libcurl4t64-8.5.0-2ubuntu10.15",
      "released": "2026-09-28T20:16:36Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.7",
      "fix": "libcurl4t64 8.18.0-1ubuntu2.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcurl4t64-8.18.0-1ubuntu2.7",
      "released": "2026-09-06T11:17:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}