{
  "cveId": "CVE-2026-118180",
  "url": "https://patchblox.com/security/cve/CVE-2026-118180",
  "summary": "CVE-2026-118180 is fixed in thunderbird on 1 platform, first by DEBIAN-CVE-2026-118180, released October 31, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "thunderbird: When logging in to a Matrix account, Thunderbird used the homeserver address provided in the server\u0027s login response...",
  "description": "When logging in to a Matrix account, Thunderbird used the homeserver address provided in the server\u0027s login response without validating it. A malicious or compromised homeserver could provide a file: URL, causing Thunderbird to send all further Matrix requests of that session to local files or, on Windows, to an attacker-controlled network share, which could leak the user\u0027s NTLM credentials. The NTLM credential leak only affects Thunderbird on Windows. Other operating systems are unaffected. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.",
  "published": "2026-10-27T19:17:29Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00324,
  "epssPercentile": 0.25593,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:153.6.0esr-1~deb12u2",
      "fix": "DEBIAN-CVE-2026-118180",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-118180",
      "released": "2026-10-31T22:18:21Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:153.6.0esr-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-118180",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-118180",
      "released": "2026-10-31T22:18:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}