{
  "fix": "libcurl4t64 8.18.0-1ubuntu2.3",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcurl4t64-8.18.0-1ubuntu2.3",
  "summary": "libcurl4t64 8.18.0-1ubuntu2.3, released June 24, 2026, fixes 5 CVEs in libcurl4t64. None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "linux",
  "type": "package",
  "title": "libcurl4t64 8.18.0-1ubuntu2.3 for Ubuntu 26.04.1 LTS (resolute)",
  "released": "2026-06-24T07:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-11564, rated Critical",
  "supported": true,
  "cveCount": 5,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.0101,
  "maxCvss": 9.8,
  "appliesTo": [
    {
      "product": "libcurl4t64",
      "productUrl": "https://patchblox.com/security/product/linux/libcurl4t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.3",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-11564",
      "url": "https://patchblox.com/security/cve/CVE-2026-11564",
      "title": "curl: libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them match...",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.1,
      "epss": 0.0061,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-11352",
      "url": "https://patchblox.com/security/cve/CVE-2026-11352",
      "title": "curl: An issue in curl\u2019s QUIC UDP receive function allows a malicious HTTP/3 server to trigger a remote denial of service a...",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.0101,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-11586",
      "url": "https://patchblox.com/security/cve/CVE-2026-11586",
      "title": "curl: By default, curl automatically responds to WebSocket PING frames",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.0086,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-10536",
      "url": "https://patchblox.com/security/cve/CVE-2026-10536",
      "title": "HTTP/2 stream-dependency tree UAF",
      "priority": "High",
      "severity": "Moderate",
      "cvss": 9.8,
      "epss": 0.00598,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-12064",
      "url": "https://patchblox.com/security/cve/CVE-2026-12064",
      "title": "proto-default skips SSH verification",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.00414,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-12T13:55:20Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}