{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.22.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7"
            },
            {
              "fixed": "1bae220c1205e28b31d54621c8954a05947224bb"
            }
          ],
          "repo": "https://github.com/quasarframework/quasar",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3r53-75j5-3g7j"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1321"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73647.json"
  },
  "details": "Quasar Framework is a framework for building high-performance Vue.js user interfaces. Prior to 2.22.0, the public extend() utility in ui/src/utils/extend/extend.js recursively copied attacker-controlled object keys during extend(true, target, source) deep merges without rejecting an own __proto__ property. The merge could descend into the prototype object and write attacker-controlled properties to Object.prototype in the same JavaScript process. Applications that passed user-controlled or partially user-controlled objects to extend() could experience logic bypass, unsafe default-option injection, denial of service, or other application-specific impact when polluted properties were later consumed. This issue is fixed in version 2.22.0.",
  "id": "CVE-2026-73647",
  "modified": "2026-09-11T03:30:52.328264004Z",
  "published": "2026-08-13T17:57:09.014Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/quasarframework/quasar/releases/tag/quasar-v2.22.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73647.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/quasarframework/quasar/security/advisories/GHSA-3r53-75j5-3g7j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73647"
    },
    {
      "type": "FIX",
      "url": "https://github.com/quasarframework/quasar/commit/d0a95d95ab3c29d13e1b8ba8c5e5025fd6ce35e7"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Quasar Framework: Prototype pollution in Quasar extend() utility"
}