{
  "schemaVersion": 1,
  "incident": {
    "id": "cve-2026-106445",
    "url": "https://cveboard.org/i/cve-2026-106445",
    "urlPt": "https://cveboard.org/pt/i/cve-2026-106445",
    "json": "https://cveboard.org/i/cve-2026-106445.json",
    "kind": "vuln",
    "live": false,
    "knownExploited": false,
    "severity": "critical",
    "title": "Handlebars: JavaScript Injection via Own Property Check Bypass",
    "summary": "Handlebars can expose the Function constructor despite its prototype-access deny list. When a template reaches Function.prototype, its own constructor property is returned before the deny list is checked. An attacker who can render a controlled template with allowProtoMethodsByDefault: true can inject and execute arbitrary JavaScript, leading to Remote Code Execution on the server.",
    "titlePt": "Handlebars: Injeção de JavaScript via contorno de verificação de propriedade própria",
    "summaryPt": "Handlebars pode expor o construtor Function apesar de sua lista de negação de acesso ao protótipo. Quando um modelo atinge Function.prototype, sua própria propriedade construtora é retornada antes da lista de negação ser verificada. Um atacante que puder renderizar um modelo controlado com allowProtoMethodsByDefault: true pode injetar e executar JavaScript arbitrário, levando à execução remota de código no servidor.",
    "cves": [
      "CVE-2026-106445"
    ],
    "ghsa": "GHSA-p8wg-vrv2-v86f",
    "cvss": {
      "score": 9.2,
      "version": "4.0"
    },
    "epss": {
      "percentage": 0.00411,
      "percentile": 0.33569,
      "asOf": "2026-10-23"
    },
    "packages": [
      {
        "ecosystem": "npm",
        "name": "handlebars",
        "vulnerable": ">= 3.0.0, <= 4.7.9",
        "fixed": "4.7.10",
        "advisory": "GHSA-p8wg-vrv2-v86f"
      }
    ],
    "vendor": null,
    "product": null,
    "kev": null,
    "breach": null,
    "retracted": false,
    "sources": [
      {
        "label": "GitHub Advisory Database",
        "url": "https://github.com/advisories/GHSA-p8wg-vrv2-v86f"
      }
    ],
    "publishedAt": "2026-10-08T17:52:26.000Z",
    "updatedAt": "2026-10-08T17:52:26.000Z"
  },
  "live": false,
  "events": [
    {
      "id": "ghsa:GHSA-p8wg-vrv2-v86f:ghsa_published:2026-10-08T17:52:26.000Z",
      "incidentId": "cve-2026-106445",
      "type": "ghsa_published",
      "at": "2026-10-08T17:52:26.000Z",
      "detail": {
        "ghsa": "GHSA-p8wg-vrv2-v86f",
        "severity": "critical",
        "fixed": "4.7.10"
      }
    }
  ]
}