{
  "cveId": "CVE-2026-84970",
  "url": "https://patchblox.com/security/cve/CVE-2026-84970",
  "summary": "CVE-2026-84970 is fixed in mongo-cxx-driver on 1 platform by DEBIAN-CVE-2026-84970 (version 4.5.2-1), released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "mongo-cxx-driver: A numeric truncation weakness exists in the JSON parsing component of the MongoDB C\u002B\u002B Driver\u0027s BSON library",
  "description": "A numeric truncation weakness exists in the JSON parsing component of the MongoDB C\u002B\u002B Driver\u0027s BSON library. An actor who controls the text that an embedding application hands to the library\u0027s public JSON parsing interface, when that text is very large, can cause the library to read memory beyond the supplied buffer and return it to the caller, to silently accept only part of the input as a complete document, or to terminate the process. No MongoDB server, credentials, or non-default configuration is required; the effect is confined to the process that uses the library.",
  "published": "2026-09-03T15:17:36Z",
  "severity": "medium",
  "cvss": 5.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H",
  "epss": 0.00124,
  "epssPercentile": 0.02137,
  "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-2026-84970",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-84970",
      "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"
  }
}