{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.6.0"
              },
              {
                "fixed": "3.6.15"
              },
              {
                "introduced": "4.0.0"
              },
              {
                "fixed": "4.0.13"
              },
              {
                "introduced": "4.2.0"
              },
              {
                "fixed": "4.2.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "a57d8e71e6998a2d0afde7edc11bd23e5661c915"
            },
            {
              "fixed": "18934fb5c814e87895c5e38ae1515dd6cb4c00f7"
            },
            {
              "introduced": "3b07af3d4f471ae89e8186d33bbb1d5259597d51"
            },
            {
              "fixed": "bda366f0b0e432ca143bc41da54d8732bd8d03c0"
            },
            {
              "introduced": "a4b751dcf51dd249c5865812b390cfd1c0129c30"
            },
            {
              "fixed": "edf6d45851c0b9ee15548f0f847df141764a317e"
            }
          ],
          "repo": "https://github.com/mongodb/mongo",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries, which use $lookup and collations. This issue affects MongoDB Server v4.2 versions prior to 4.2.1; MongoDB Server v4.0 versions prior to 4.0.13 and MongoDB Server v3.6 versions prior to 3.6.15.",
  "id": "CVE-2019-2393",
  "modified": "2026-03-13T21:55:22.678781226Z",
  "published": "2020-11-23T16:15:13.027Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://jira.mongodb.org/browse/SERVER-43350"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}