{
  "fix": "libundertow-java 2.3.20-1ubuntu1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libundertow-java-2.3.20-1ubuntu1",
  "summary": "libundertow-java 2.3.20-1ubuntu1, released January 7, 2026, fixes 1 CVE in libundertow-java. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "package",
  "title": "libundertow-java 2.3.20-1ubuntu1 for Ubuntu 26.04.1 LTS (resolute)",
  "released": "2026-01-07T09:15:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-12543, high severity",
  "supported": true,
  "cveCount": 1,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01333,
  "appliesTo": [
    {
      "product": "libundertow-java",
      "productUrl": "https://patchblox.com/security/product/linux/libundertow-java",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.3.20-1ubuntu1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2025-12543",
      "url": "https://patchblox.com/security/cve/CVE-2025-12543",
      "title": "libundertow-java: A flaw was found in the Undertow HTTP server core, which is used in WildFly, JBoss EAP, and other Java applications",
      "priority": "High",
      "severity": "High",
      "epss": 0.01333,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}