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CVE-2026-27498

Estado: AnalizadaCrítica (9)—

n8n is an open source workflow automation platform. Prior to versions 2.2.0 and 1.123.8, an authenticated user with permission to create or modify workflows could chain the Read/Write Files from Disk node with git operations to achieve remote code execution. By writing to specific configuration files and then triggering a git operation, the attacker could execute arbitrary shell commands on the n8n host. The issue has been fixed in n8n versions 2.2.0 and 1.123.8. Users should upgrade to one of these versions or later to remediate the vulnerability.

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If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Read/Write Files from Disk node by adding `n8n-nodes-base.readWriteFile` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

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.

CVE-2026-27498: Usuario autenticado (PR:L) en red explota CWE-94 (improper control of generation of code) encadenando nodos para ejecutar comandos arbitrarios en el host n8n mediante manipulación de ficheros de configuración y git.

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 ManagementNetwork SegmentationDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramRestrict Web-Based Content

Tecnologías afectadas (1)

N8N — N8N

CWE

Referencias

JSON original (NVD)

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          "options": [
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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      "value": "n8n is an open source workflow automation platform. Prior to versions 2.2.0 and 1.123.8, an authenticated user with permission to create or modify workflows could chain the Read/Write Files from Disk node with git operations to achieve remote code execution. By writing to specific configuration files and then triggering a git operation, the attacker could execute arbitrary shell commands on the n8n host. The issue has been fixed in n8n versions 2.2.0 and 1.123.8. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Read/Write Files from Disk node by adding `n8n-nodes-base.readWriteFile` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures."
    },
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      "lang": "es",
      "value": "n8n es una plataforma de automatización de flujos de trabajo de código abierto. Antes de las versiones 2.2.0 y 1.123.8, un usuario autenticado con permiso para crear o modificar flujos de trabajo podía encadenar el nodo Read/Write Files from Disk con operaciones git para lograr la ejecución remota de código. Al escribir en archivos de configuración específicos y luego activar una operación git, el atacante podía ejecutar comandos de shell arbitrarios en el host de n8n. El problema ha sido solucionado en las versiones 2.2.0 y 1.123.8 de n8n. Los usuarios deben actualizar a una de estas versiones o posteriores para remediar la vulnerabilidad. Si la actualización no es posible de inmediato, los administradores deben considerar las siguientes mitigaciones temporales. Limite los permisos de creación y edición de flujos de trabajo solo a usuarios de plena confianza, y/o deshabilite el nodo Read/Write Files from Disk añadiendo 'n8n-nodes-base.readWriteFile' a la variable de entorno 'NODES_EXCLUDE'. Estas soluciones provisionales no remedian completamente el riesgo y solo deben usarse como medidas de mitigación a corto plazo."
    }
  ],
  "lastModified": "2026-06-17T10:27:15.590",
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