{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.28.7"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f9914ad9effc865ccc27d816255625890b31ca51"
            },
            {
              "fixed": "b637868045806d2fba4c24eb0060e4cc8b1db276"
            }
          ],
          "repo": "https://github.com/browserslist/browserslist",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-73wf-gq98-2v4g"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1321",
      "CWE-248"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73088.json"
  },
  "details": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7.",
  "id": "CVE-2026-73088",
  "modified": "2026-08-15T11:30:53.812316255Z",
  "published": "2026-08-11T17:00:05.869Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73088.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73088"
    },
    {
      "type": "FIX",
      "url": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)"
}