Use-After-Free in MongoDB Server Query Execution Memory Tracking Subsystem Leads to Denial of Service

{
  "id": "2951b5e82e482a62a16feac80bef39425793996114837ff2ad504202baffe9f5",
  "url": "https://osv.dev/vulnerability/CVE-2026-82061",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Use-After-Free in MongoDB Server Query Execution Memory Tracking Subsystem Leads to Denial of Service",
    "summary": "A use-after-free security issue exists in the server's query execution memory tracking subsystem. An authenticated user with read privileges can trigger a write to freed heap memory through a sequence of standard database commands, leading to server process crash or potential memory corruption. No user interaction is required.",
    "evidence": "osv:CVE-2026-82061",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-82061",
      "aliases": [
        "BIT-mongodb-2026-82061",
        "CVE-2026-82061"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mongodb/mongo",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0f29b043a58fdd251ce0a0b32754b8459613c933"
                },
                {
                  "fixed": "1dc3d60c3237b53589325474c668e849ecec3bae"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*",
                    "range": [
                      {
                        "introduced": "8.3.0"
                      },
                      {
                        "fixed": "8.3.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "r8.3.3",
            "r8.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82061.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.708187770Z",
      "provider": "osv",
      "references": [
        "https://jira.mongodb.org/browse/SERVER-130907",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82061.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-82061"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-416"
        ],
        "cna_assigner": "mongodb",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.3.0"
                  },
                  {
                    "fixed": "8.3.9"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82061.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-82061",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506293,
  "published_at": "2026-09-08T16:12:22.411+00:00"
}