{
  "affected": [
    {
      "database_specific": {
        "unresolved_ranges": [
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "83.0"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "78.5"
              }
            ]
          },
          {
            "events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "78.5"
              }
            ]
          }
        ]
      }
    }
  ],
  "details": "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.",
  "id": "CVE-2020-26966",
  "modified": "2026-03-15T21:44:41.999995220Z",
  "published": "2020-12-09T01:15:13.580Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.mozilla.org/security/advisories/mfsa2020-50/"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.mozilla.org/security/advisories/mfsa2020-51/"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.mozilla.org/security/advisories/mfsa2020-52/"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1663571"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}