{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "klona"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2020-08-31T19:00:12Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-8f89-2fwj-5v5r. This link is maintained to preserve external references.\n\n## Original Description\nVersions of `klona` prior to 1.1.1 are vulnerable to prototype pollution. The package does not restrict the modification of an Object\u0027s prototype when cloning objects, which may allow an attacker to add or modify an existing property that will exist on all objects.\n\n\n\n\n## Recommendation\n\nUpgrade to version 1.1.1 or later.",
  "id": "GHSA-4r97-78gf-q24v",
  "modified": "2025-07-18T19:42:53Z",
  "published": "2020-09-04T17:53:27Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/778414"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/advisories/1463"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "Duplicate Advisory: Prototype Pollution in klona",
  "withdrawn": "2025-07-18T19:42:53Z"
}