{
  "cveId": "CVE-2020-26966",
  "url": "https://patchblox.com/security/cve/CVE-2020-26966",
  "summary": "CVE-2020-26966 is fixed in 2 products on 1 platform, first by Mozilla Thunderbird (en-US) 78.10.0, released April 15, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "Firefox ESR and 2 others: Searching for a single word from the address bar caused an mDNS request to be sent on the local network\u2026",
  "description": "Searching for a single word from the address bar caused an mDNS request to be sent on the local network searching for a hostname consisting of that string; resulting in an information leak. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003C 83, Firefox ESR \u003C 78.5, and Thunderbird \u003C 78.5.",
  "published": "2020-12-09T01:15:13Z",
  "severity": "",
  "cvss": 6.5,
  "epss": 0.01354,
  "epssPercentile": 0.71771,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://nvd.nist.gov/vuln/detail/CVE-2020-26966",
  "fixes": [
    {
      "platform": "windows-app",
      "product": "Mozilla Firefox ESR (en-US)",
      "fixedVersion": "91.0",
      "fix": "Mozilla Firefox ESR (en-US) 91.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.firefox.esr-91.0",
      "released": "2021-08-04T00:00:00Z"
    },
    {
      "platform": "windows-app",
      "product": "Mozilla Thunderbird (en-US)",
      "fixedVersion": "78.10.0",
      "fix": "Mozilla Thunderbird (en-US) 78.10.0",
      "url": "https://patchblox.com/security/fix/windows-app/mozilla.thunderbird-78.10.0",
      "released": "2021-04-15T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}