{
  "cveId": "CVE-2019-12290",
  "url": "https://patchblox.com/security/cve/CVE-2019-12290",
  "summary": "CVE-2019-12290 is fixed in 2 products on 1 platform, first by idn2 2.0.4-1.1ubuntu0.2, released October 22, 2019. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "idn2: GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-lab...",
  "description": "GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.",
  "published": "2019-10-22T09:15:00Z",
  "severity": "Medium",
  "epss": 0.03225,
  "epssPercentile": 0.88322,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "idn2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.0.4-1.1ubuntu0.2",
      "fix": "idn2 2.0.4-1.1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-idn2-2.0.4-1.1ubuntu0.2",
      "released": "2019-10-22T09:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libidn2-0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.0.4-1.1ubuntu0.2",
      "fix": "libidn2-0 2.0.4-1.1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libidn2-0-2.0.4-1.1ubuntu0.2",
      "released": "2019-10-22T09:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}