CVE-2026-27494

n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could use the Python Code node to escape the sandbox. The sandbox did not sufficiently restrict access to certain built-in Python objects, allowing an attacker to exfiltrate file contents or achieve RCE. On instances using internal Task Runners (default runner mode), this could result in full compromise of the n8n host. On instances using external Task Runners, the attacker might gain access to or impact other task executed on the Task Runner. Task Runners must be enabled using `N8N_RUNNERS_ENABLED=true`. The issue has been fixed in n8n versions 2.10.1, 2.9.3, and 1.123.22. Users should upgrade to this version 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 Code node by adding `n8n-nodes-base.code` 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 v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.22	Product
https://github.com/n8n-io/n8n/releases/tag/n8n@2.10.1	Product
https://github.com/n8n-io/n8n/releases/tag/n8n@2.9.3	Product
https://github.com/n8n-io/n8n/security/advisories/GHSA-mmgg-m5j7-f83h	Vendor Advisory Mitigation

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*
	cpe:2.3:a:n8n:n8n::::::node.js::*

History

No history.

Information

Published : 2026-02-25 23:16

Updated : 2026-03-05 16:22

NVD link : CVE-2026-27494

Mitre link : CVE-2026-27494

CVE.ORG link : CVE-2026-27494

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-497

Exposure of Sensitive System Information to an Unauthorized Control Sphere

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Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could use the Python Code node to escape the sandbox. The sandbox did not sufficiently restrict access to certain built-in Python objects, allowing an attacker to exfiltrate file contents or achieve RCE. On instances using internal Task Runners (default runner mode), this could result in full compromise of the n8n host. On instances using external Task Runners, the attacker might gain access to or impact other task executed on the Task Runner. Task Runners must be enabled using `N8N_RUNNERS_ENABLED=true`. The issue has been fixed in n8n versions 2.10.1, 2.9.3, and 1.123.22. Users should upgrade to this version 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 Code node by adding `n8n-nodes-base.code` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures."}, {"lang": "es", "value": "n8n es una plataforma de automatizaci\u00f3n de flujos de trabajo de c\u00f3digo abierto. Antes de las versiones 2.10.1, 2.9.3 y 1.123.22, un usuario autenticado con permiso para crear o modificar flujos de trabajo pod\u00eda usar el nodo de C\u00f3digo Python para escapar del sandbox. El sandbox no restring\u00eda suficientemente el acceso a ciertos objetos Python incorporados, permitiendo a un atacante exfiltrar contenidos de archivos o lograr RCE. En instancias que usan Task Runners internos (modo de ejecutor predeterminado), esto podr\u00eda resultar en un compromiso total del host de n8n. En instancias que usan Task Runners externos, el atacante podr\u00eda obtener acceso o impactar otras tareas ejecutadas en el Task Runner. Los Task Runners deben habilitarse usando `N8N_RUNNERS_ENABLED=true`. El problema ha sido solucionado en las versiones de n8n 2.10.1, 2.9.3 y 1.123.22. Los usuarios deben actualizar a esta versi\u00f3n o posterior para remediar la vulnerabilidad. Si la actualizaci\u00f3n no es posible de inmediato, los administradores deben considerar las siguientes mitigaciones temporales. Limitar los permisos de creaci\u00f3n y edici\u00f3n de flujos de trabajo solo a usuarios de plena confianza, y/o deshabilitar el nodo de C\u00f3digo a\u00f1adiendo `n8n-nodes-base.code` a la variable de entorno `NODES_EXCLUDE`. Estas soluciones provisionales no remedian completamente el riesgo y solo deben usarse como medidas de mitigaci\u00f3n a corto plazo."}], "lastModified": "2026-03-05T16:22:42.753", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "77E36F68-2FDD-4771-B2DD-3F0A168E92E1", "versionEndExcluding": "1.123.22"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "CDB18D4D-1D4C-422A-BE3E-0FF8FC9DDD82", "versionEndExcluding": "2.9.3", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "C2CBC039-F880-4DB3-968B-2520126388E6", "versionEndExcluding": "2.10.1", "versionStartIncluding": "2.10.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}