ghsa-fvqr-27wr-82fm
Vulnerability from github
Published
2018-07-26 15:14
Modified
2025-08-12 21:37
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
Prototype Pollution in lodash
Details

Versions of lodash before 4.17.5 are vulnerable to prototype pollution.

The vulnerable functions are 'defaultsDeep', 'merge', and 'mergeWith' which allow 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.

Recommendation

Update to version 4.17.5 or later.

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "lodash"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "lodash-rails"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.17.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2018-3721"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321",
      "CWE-471"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-06-16T21:35:26Z",
    "nvd_published_at": "2018-06-07T02:29:08Z",
    "severity": "MODERATE"
  },
  "details": "Versions of `lodash` before 4.17.5 are vulnerable to prototype pollution. \n\nThe vulnerable functions are \u0027defaultsDeep\u0027, \u0027merge\u0027, and \u0027mergeWith\u0027 which allow 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.\n\n\n\n\n## Recommendation\n\nUpdate to version 4.17.5 or later.",
  "id": "GHSA-fvqr-27wr-82fm",
  "modified": "2025-08-12T21:37:06Z",
  "published": "2018-07-26T15:14:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3721"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lodash/lodash/commit/d8e069cc3410082e44eb18fcf8e7f3d08ebe1d4a"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/310443"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/lodash-rails/CVE-2018-3721.yml"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20190919-0004"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Prototype Pollution in lodash"
}


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