{
  "cveId": "CVE-2026-113866",
  "url": "https://patchblox.com/security/cve/CVE-2026-113866",
  "summary": "CVE-2026-113866 is fixed in thunderbird on 1 platform, first by DEBIAN-CVE-2026-113866, released October 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "thunderbird: When setting up an account, Thunderbird\u0027s Exchange AutoDiscover lookup also queried the domain\u0027s AutoDiscover service...",
  "description": "When setting up an account, Thunderbird\u0027s Exchange AutoDiscover lookup also queried the domain\u0027s AutoDiscover service over plain HTTP. Due to a bug, that unencrypted request included the credentials the user had entered, allowing a network attacker to obtain the user\u0027s password. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.5.1.",
  "published": "2026-10-20T20:17:19Z",
  "severity": "medium",
  "cvss": 5.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00365,
  "epssPercentile": 0.30543,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:153.5.1esr-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-113866",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-113866",
      "released": "2026-10-27T21:14:52Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:153.5.1esr-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-113866",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-113866",
      "released": "2026-10-27T21:14:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T07:50:38Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}