{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "cpe": "cpe:2.3:a:mongodb:libmongocrypt:*:*:*:*:*:*:*:*",
                "range": [
                  {
                    "introduced": "1.5.0"
                  },
                  {
                    "fixed": "1.20.5"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          "events": [
            {
              "introduced": "86d80e2b8d79d432fc0befc38d1bbdb73a4d7795"
            },
            {
              "fixed": "f2158c3304df5ecdd7853e74b6c96a7bba96a11f"
            }
          ],
          "repo": "https://github.com/mongodb/libmongocrypt",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mongodb",
    "cwe_ids": [
      "CWE-843"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106433.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "range": [
              {
                "introduced": "1.1.0"
              },
              {
                "fixed": "1.20.5"
              }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
          }
        ]
      }
    ]
  },
  "details": "Improper state management in MongoDB libmongocrypt can cause provider-specific data to be treated as an incompatible type when cleaning up a key document containing duplicate masterKey fields. An authenticated actor who can modify key vault documents, or a server that returns such a key document, can cause invalid memory access and invalid frees in the client process. This can terminate the application or corrupt process memory.",
  "id": "CVE-2026-106433",
  "modified": "2026-10-29T02:30:29.947617584Z",
  "published": "2026-10-08T18:55:34.174Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://jira.mongodb.org/browse/MONGOCRYPT-964"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106433.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106433"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Heap corruption via duplicate masterKey fields in MongoDB libmongocrypt"
}