{
  "fix": "libevent-core-2.1-6 2.1.8-stable-4ubuntu0.1~esm1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libevent-core-2.1-6-2.1.8-stable-4ubuntu0.1-esm1",
  "summary": "libevent-core-2.1-6 2.1.8-stable-4ubuntu0.1~esm1, released September 3, 2026, fixes 5 CVEs in libevent-core-2.1-6. None of them is reported as exploited. Patch Radar priority: Urgent. The product is no longer supported.",
  "platform": "linux",
  "type": "package",
  "title": "libevent-core-2.1-6 2.1.8-stable-4ubuntu0.1~esm1 for Ubuntu 18.04.6 LTS (bionic)",
  "released": "2026-09-03T01:35:39Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-63385, rated Critical",
  "supported": false,
  "cveCount": 5,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01991,
  "maxCvss": 8.6,
  "appliesTo": [
    {
      "product": "libevent-core-2.1-6",
      "productUrl": "https://patchblox.com/security/product/linux/libevent-core-2.1-6",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.1.8-stable-4ubuntu0.1~esm1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-63385",
      "url": "https://patchblox.com/security/cve/CVE-2026-63385",
      "title": "Libevent: HTTP header handling bugs create risk of access control bypass.",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 8.6,
      "epss": 0.01292,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-63382",
      "url": "https://patchblox.com/security/cve/CVE-2026-63382",
      "title": "libevent: Libevent is an event notification library",
      "priority": "High",
      "severity": "Medium",
      "cvss": 8.6,
      "epss": 0.01991,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-63383",
      "url": "https://patchblox.com/security/cve/CVE-2026-63383",
      "title": "Libevent: decode_tag_internal() can lead to out-of-bounds read",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.6,
      "epss": 0.00488,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-63384",
      "url": "https://patchblox.com/security/cve/CVE-2026-63384",
      "title": "Libevent: \u0060evtag_unmarshal_header()\u0060 decodes a wire \u0060uint32\u0060 length into a signed \u0060int\u0060 return value.",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.6,
      "epss": 0.00488,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-63381",
      "url": "https://patchblox.com/security/cve/CVE-2026-63381",
      "title": "Libevent: Dangling Pointer in \u0060evbuffer_add_buffer_reference\u0060",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 8.6,
      "epss": 0.00121,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-13T01:58:51Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}