{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3bffead2dba66146564bc7471b749c4a47cc18b5"
            },
            {
              "fixed": "9e951e1d683ddd5767dc5d3e4510e85a171d6dba"
            }
          ],
          "repo": "https://github.com/mongodb/mongo-c-driver",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-frjf-h5jg-4v46"
  ],
  "database_specific": {
    "cna_assigner": "mongodb",
    "cwe_ids": [
      "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96746.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "1.30.12"
          },
          {
            "introduced": "2.0.0"
          },
          {
            "fixed": "2.5.5"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.",
  "id": "CVE-2026-96746",
  "modified": "2026-09-26T03:30:43.149032128Z",
  "published": "2026-09-24T15:51:15.196Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/mongodb/mongo-c-driver/releases/tag/1.30.12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mongodb/mongo-c-driver/releases/tag/2.5.5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/96xxx/CVE-2026-96746.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/mongodb/mongo-c-driver/security/advisories/GHSA-frjf-h5jg-4v46"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96746"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Heap buffer overflow via mid-scan command list growth in client topology monitoring"
}