Security advisory

{
  "id": "a3e70db1c9f09be7cd38dc5773454af78c0b66b125808c9a1c9fa2f6b3b29fe1",
  "url": "https://osv.dev/vulnerability/CVE-2018-3720",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-3720",
    "summary": "assign-deep node module before 0.4.7 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-2018-3720",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-3720",
      "aliases": [
        "CVE-2018-3720",
        "GHSA-xcvv-84j5-jw9h"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jonschlinkert/assign-deep",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "24412bd2b59bc128437819c4a4518a7b7148d81a"
                },
                {
                  "fixed": "19953a8c089b0328c470acaaaf6accdfcb34da11"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:assign-deep_project:assign-deep:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.4.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "19953a8c089b0328c470acaaaf6accdfcb34da11"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.4.6",
            "0.4.5",
            "0.4.4",
            "0.4.3",
            "0.4.2",
            "0.4.0",
            "0.3.1",
            "0.3.0",
            "0.1.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-3720.json"
          }
        }
      ],
      "modified": "2026-10-20T10:49:49.650761506Z",
      "provider": "osv",
      "references": [
        "https://github.com/jonschlinkert/assign-deep/commit/19953a8c089b0328c470acaaaf6accdfcb34da11",
        "https://hackerone.com/reports/310707"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-3720",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380845,
  "published_at": "2018-06-07T02:29:08.27+00:00"
}