CVE-2025-55130

Estado: ModificadaCrítica (9.1)—

A flaw in Node.js’s Permissions model allows attackers to bypass `--allow-fs-read` and `--allow-fs-write` restrictions using crafted relative symlink paths. By chaining directories and symlinks, a script granted access only to the current directory can escape the allowed path and read sensitive files. This breaks the expected isolation guarantees and enables arbitrary file read/write, leading to potential system compromise. This vulnerability affects users of the permission model on Node.js v20, v22, v24, and v25.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Puntuación base: 9.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 1.72%
Percentil entre todas las CVEs puntuadas: 77
Fecha de la puntuación: 6/10/2026

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.

ExplotaciónT1190 Exploit Public-Facing Applicationinitial access85 %
Impacto principalT1005 Data from Local Systemcollection90 %
Impacto secundarioT1565.001 Stored Data Manipulationimpact80 %

Vulnerabilidad de aplicación Node.js expuesta en red (AV:N, PR:N, UI:N) que permite eludir restricciones de permiso mediante symlinks relativos, logrando lectura arbitraria de archivos sensibles (C:H) y escritura (I:H).

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

Vulnerability Scanning Restrict File and Directory Permissions Privileged Account Management Remote Data Storage Network Segmentation Limit Access to Resource Over Network

Tecnologías afectadas (1)

Nodejs — Node.js

CWE

CWE-289
CWE-281

Referencias

JSON original (NVD)

Mostrar

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      "value": "A flaw in Node.js’s Permissions model allows attackers to bypass `--allow-fs-read` and `--allow-fs-write` restrictions using crafted relative symlink paths. By chaining directories and symlinks, a script granted access only to the current directory can escape the allowed path and read sensitive files. This breaks the expected isolation guarantees and enables arbitrary file read/write, leading to potential system compromise.\nThis vulnerability affects users of the permission model on Node.js v20,  v22,  v24, and v25."
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      "value": "Una falla en el modelo de permisos de Node.js permite a los atacantes eludir las restricciones `--allow-fs-read` y `--allow-fs-write` utilizando rutas de enlaces simbólicos relativos manipuladas. Al encadenar directorios y enlaces simbólicos, un script al que se le concedió acceso solo al directorio actual puede escapar de la ruta permitida y leer archivos sensibles. Esto rompe las garantías de aislamiento esperadas y permite la lectura/escritura arbitraria de archivos, lo que lleva a un posible compromiso del sistema.\nEsta vulnerabilidad afecta a los usuarios del modelo de permisos en Node.js v20, v22, v24 y v25."
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