CVE-2026-118660

{
  "etk_id": "ETK-2026-2903",
  "cve_id": "CVE-2026-118660",
  "display_id": "CVE-2026-118660",
  "ghsa_id": "GHSA-c8p4-j97h-3vg8",
  "euvd_id": null,
  "status": "published",
  "anchor_state": "anchored",
  "title": "Server-side request forgery in happy-dom HTML parsing",
  "summary": "Happy DOM before 21.0.0 can fetch iframe and stylesheet URLs while parsing untrusted HTML on a server. An attacker who controls that HTML may cause requests to internal or cloud-hosted endpoints and potentially expose data returned by those services.",
  "mitigation": "Upgrade happy-dom to version 21.0.0 or later. Until upgrading, disable iframe page loading and CSS file loading when parsing untrusted HTML.",
  "vendor": "capricorn86",
  "product": "happy-dom",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        "<= 20.14.6"
      ],
      "ecosystem": "npm",
      "fixed_versions": [
        "=>21.0.0"
      ],
      "package_name": "happy-dom",
      "purl": "pkg:npm/happy-dom"
    }
  ],
  "cwes": [
    918
  ],
  "cvss_score": 8.6,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 10.680308116666668,
  "t0_at": "2026-10-28T20:23:10.122000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-28T20:23:10.122000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-28T20:23:10.122000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-118660"
    }
  }
}