{
  "cveId": "CVE-2026-87865",
  "url": "https://patchblox.com/security/cve/CVE-2026-87865",
  "summary": "CVE-2026-87865 is fixed in 3 products on 1 platform, first by curl 8.18.0-1ubuntu2.8, released November 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "knownhost callback mismatches key as missing",
  "description": "When libcurl uses libssh2 with a hashed \u0060known_hosts\u0060 file, an unrelated initial entry can cause host key validation to report a key *mismatch* as a *missing* key to the \u0060CURLOPT_SSH_KEYFUNCTION\u0060 callback.",
  "published": "2026-10-13T23:00:00Z",
  "severity": "Moderate",
  "cvss": 6.8,
  "epss": 0.00604,
  "epssPercentile": 0.49383,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87865",
  "fixes": [
    {
      "platform": "linux",
      "product": "curl",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.8",
      "fix": "curl 8.18.0-1ubuntu2.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-curl-8.18.0-1ubuntu2.8",
      "released": "2026-11-07T00:38:05Z"
    },
    {
      "platform": "linux",
      "product": "libcurl3t64-gnutls",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.8",
      "fix": "libcurl3t64-gnutls 8.18.0-1ubuntu2.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcurl3t64-gnutls-8.18.0-1ubuntu2.8",
      "released": "2026-11-07T00:38:05Z"
    },
    {
      "platform": "linux",
      "product": "libcurl4t64",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "8.18.0-1ubuntu2.8",
      "fix": "libcurl4t64 8.18.0-1ubuntu2.8",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libcurl4t64-8.18.0-1ubuntu2.8",
      "released": "2026-11-07T00:38:05Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-12T07:53:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}