Security advisory

{
  "id": "44dbdbfc4f8a110766849d52fccb8627000f0128a43e0645a0658b2d13b9b36c",
  "url": "https://osv.dev/vulnerability/CVE-2018-3722",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-3722",
    "summary": "merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of \"Object\" via __proto__, causing the addition or modification of an existing property that will exist on all objects.",
    "evidence": "osv:CVE-2018-3722",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-3722",
      "aliases": [
        "CVE-2018-3722",
        "GHSA-9g9w-hmvj-5h57"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jonschlinkert/merge-deep",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "209ed07aec07e87f1f7cda828056e5283f2df7e0"
                },
                {
                  "fixed": "2c33634da7129a5aefcc262d2fec2e72224404e5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:merge-deep_project:merge-deep:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2c33634da7129a5aefcc262d2fec2e72224404e5"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.0.0",
            "2.0.2",
            "2.0.1",
            "v1.0.3",
            "1.0.3",
            "1.0.1",
            "0.1.5",
            "v0.1.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-3722.json"
          }
        }
      ],
      "modified": "2026-10-20T10:48:09.911709146Z",
      "provider": "osv",
      "references": [
        "https://github.com/jonschlinkert/merge-deep/commit/2c33634da7129a5aefcc262d2fec2e72224404e5",
        "https://hackerone.com/reports/310708"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-3722",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380104,
  "published_at": "2018-06-07T02:29:08.363+00:00"
}