{
  "cveId": "CVE-2026-19931",
  "url": "https://patchblox.com/security/cve/CVE-2026-19931",
  "summary": "CVE-2026-19931 is fixed in curl on 1 platform, first by DEBIAN-CVE-2026-19931, released September 19, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Negotiate ambient user conn reuse",
  "description": "A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given hostname using Negotiate authentication, when the initial request is done using empty credentials. This can make user B\u0027s request get sent over user A\u0027s previously authenticated connection.",
  "published": "2026-09-06T18:17:20Z",
  "severity": "Moderate",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00747,
  "epssPercentile": 0.55105,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-19931",
  "fixes": [
    {
      "platform": "linux",
      "product": "curl",
      "release": "Debian 14",
      "fixedVersion": "8.22.0~rc2-1",
      "fix": "DEBIAN-CVE-2026-19931",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-19931",
      "released": "2026-09-19T18:30:58Z"
    },
    {
      "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"
    }
  ],
  "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"
  }
}