{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "js-yaml"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.13.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2019-06-04T20:13:53Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "Versions of `js-yaml` prior to 3.13.1 are vulnerable to Code Injection. The `load()` function may execute arbitrary code injected through a malicious YAML file. Objects that have `toString` as key, JavaScript code as value and are used as explicit mapping keys allow attackers to execute the supplied code through the `load()` function. The `safeLoad()` function is unaffected.\n\nAn example payload is \n`{ toString: !\u003ctag:yaml.org,2002:js/function\u003e \u0027function (){return Date.now()}\u0027 } : 1` \nwhich returns the object \n{\n  \"1553107949161\": 1\n}\n\n\n## Recommendation\n\nUpgrade to version 3.13.1.",
  "id": "GHSA-8j8c-7jfh-h6hx",
  "modified": "2020-08-31T18:36:43Z",
  "published": "2019-06-04T20:14:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nodeca/js-yaml/pull/480"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nodeca/js-yaml/pull/480/commits/e18afbf1edcafb7add2c4c7b22abc8d6ebc2fa61"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/813"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Code Injection in js-yaml"
}