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CVE-2026-25520

Estado: AnalizadaCrítica (10)—

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries can be used to get an Array containing the host's Function constructor, by using Array.prototype.at you can obtain the hosts Function constructor, which can be used to execute arbitrary code outside of the sandbox. This vulnerability is fixed in 0.8.29.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad en librería JavaScript expuesta (AV:N, PR:N, UI:N): evasión de sandbox permitiendo ejecución de código arbitrario fuera del entorno aislado mediante manipulación de prototipos y acceso al constructor Function del host.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementExecution PreventionAuditUpdate SoftwareVulnerability ScanningUser Account Management

Tecnologías afectadas (1)

Nyariv — Sandboxjs

CWE

Referencias

JSON original (NVD)

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  "lastModified": "2026-06-17T10:24:46.997",
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