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CVE-2026-33660

Estado: AnalizadaCrítica (9.4)—

n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.26, an authenticated user with permission to create or modify workflows could use the Merge node's "Combine by SQL" mode to read local files on the n8n host and achieve remote code execution. The AlaSQL sandbox did not sufficiently restrict certain SQL statements, allowing an attacker to access sensitive files on the server or even compromise the instance. The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.26.

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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 Merge node by adding `n8n-nodes-base.merge` 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.

Usuario autenticado (PR:L) explota AlaSQL sandbox en nodo Merge para RCE y lectura de archivos. Requiere privilegios de red pero no interacción; encaja T1210. Impactos: ejecución de código (VC:H, VI:H), acceso a archivos locales (VI:H) y manipulación de datos (VA: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

Privileged Account ManagementDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramRestrict Web-Based ContentRestrict File and Directory Permissions

Tecnologías afectadas (1)

N8N — N8N

CWE

Referencias

JSON original (NVD)

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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "lang": "en",
      "value": "n8n is an open source workflow automation platform. Prior to versions 2.14.1, 2.13.3, and 1.123.26, an authenticated user with permission to create or modify workflows could use the Merge node's \"Combine by SQL\" mode to read local files on the n8n host and achieve remote code execution. The AlaSQL sandbox did not sufficiently restrict certain SQL statements, allowing an attacker to access sensitive files on the server or even compromise the instance. The issue has been fixed in n8n versions 2.14.1, 2.13.3, and 1.123.26. 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 Merge node by adding `n8n-nodes-base.merge` 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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      "value": "n8n es una plataforma de automatización de flujos de trabajo de código abierto. Antes de las versiones 2.14.1, 2.13.3 y 1.123.26, un usuario autenticado con permiso para crear o modificar flujos de trabajo podría usar el modo 'Combine by SQL' del nodo Merge para leer archivos locales en el host de n8n y lograr ejecución remota de código. El sandbox de AlaSQL no restringía suficientemente ciertas sentencias SQL, permitiendo a un atacante acceder a archivos sensibles en el servidor o incluso comprometer la instancia. El problema ha sido solucionado en las versiones de n8n 2.14.1, 2.13.3 y 1.123.26. 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: Limitar los permisos de creación y edición de flujos de trabajo solo a usuarios de plena confianza, y/o deshabilitar el nodo Merge añadiendo `n8n-nodes-base.merge` 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": "2026-06-17T10:37:52.780",
  "configurations": [
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