{
  "cveId": "CVE-2026-84966",
  "url": "https://patchblox.com/security/cve/CVE-2026-84966",
  "summary": "CVE-2026-84966 is fixed in mongo-cxx-driver on 1 platform by DEBIAN-CVE-2026-84966 (version 4.5.2-1), released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "mongo-cxx-driver: An incorrect numeric type conversion in the BSON document building component of the MongoDB C\u002B\u002B Driver may cause a le...",
  "description": "An incorrect numeric type conversion in the BSON document building component of the MongoDB C\u002B\u002B Driver may cause a length value to be interpreted incorrectly. When an application supplies an extremely large, non-terminated field name to the builder, the library may read memory outside the intended buffer and terminate the calling process. No authentication is required, but the calling application must pass the oversized name in a specific form.",
  "published": "2026-09-03T16:18:25Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00142,
  "epssPercentile": 0.03585,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "mongo-cxx-driver",
      "release": "Debian 14",
      "fixedVersion": "4.5.2-1",
      "fix": "DEBIAN-CVE-2026-84966",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84966",
      "released": "2026-09-10T12:12:19Z"
    }
  ],
  "noFixYet": [],
  "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"
  }
}