{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.24"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "b41cda4fe697dce6fd9b83b3805362ccc02fbeb3"
            },
            {
              "fixed": "d0ad95914a3351a12faf03ba35d41c43bc6feb7e"
            }
          ],
          "repo": "https://github.com/mongodb/mongo",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mongodb",
    "cwe_ids": [
      "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9743.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "8.0.0"
          },
          {
            "fixed": "8.0.24"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "In MongoDB Server 8.0, an aggregation stage can leave its _subPipeline field null during processing of certain pipelines. If a getMore is subsequently issued on the same cursor, the server may dereference this null sub-pipeline when reattaching to the operation context, accessing an invalid address and crashing the process. This issue allows an authenticated user who can run aggregation pipelines to cause a denial of service by issuing a specially crafted aggregation followed by getMore on affected versions.",
  "id": "CVE-2026-9743",
  "modified": "2026-07-15T01:49:10.198482964Z",
  "published": "2026-06-09T21:59:34.669Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://jira.mongodb.org/browse/SERVER-123688"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9743.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9743"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Aggregation sub-pipeline null dereference may allow DoS via crafted getMore"
}