{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "localeval"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "15.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-31T18:55:41Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "All versions of `localeval` are vulnerable to Sandbox Escape leading to Remote Code Execution. The package fails to restrict access to the main context through `constructor.constructor`. This may allow attackers to execute arbitrary code in the system.  Evaluating the payload \n```\nconstructor.constructor(\"return process.env\")()\n``` \n\nreturns the contents of `process.env`.\n\n\n## Recommendation\n\nNo fix is currently available. Consider using an alternative package until a fix is made available.",
  "id": "GHSA-mmqv-m45h-q2hp",
  "modified": "2026-01-16T14:47:29Z",
  "published": "2020-09-04T15:22:40Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/espadrine/localeval/issues/9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/espadrine/localeval/commit/823f112c793b8fae051eeddad61d4ed29804a56c"
    },
    {
      "type": "WEB",
      "url": "https://github.com/espadrine/localeval/commit/ce985eba77a5f89a7f718727cbaa7fb14da40335"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/espadrine/localeval"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Sandbox Breakout / Arbitrary Code Execution in localeval"
}