CVE-2026-27578

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 inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes (Form Trigger node, Chat Trigger node, Send & Wait node, Webhook Node, and Chat Node). Scripts injected by a malicious workflow execute in the browser of any user who visits the affected page, enabling session hijacking and account takeover. The issues have been fixed in n8n versions 2.10.1 and 1.123.21. 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 Webhook node by adding `n8n-nodes-base.webhook` 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 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/n8n-io/n8n/commit/062644ef786b6af480afe4a0f12bc6d70040534a	Patch
https://github.com/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6	Patch
https://github.com/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e	Patch
https://github.com/n8n-io/n8n/security/advisories/GHSA-2p9h-rqjw-gm92	Vendor Advisory

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 : 2026-03-04 03:24

NVD link : CVE-2026-27578

Mitre link : CVE-2026-27578

CVE.ORG link : CVE-2026-27578

JSON object : View

Products Affected

n8n

n8n

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-80

Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

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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 inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes (Form Trigger node, Chat Trigger node, Send & Wait node, Webhook Node, and Chat Node). Scripts injected by a malicious workflow execute in the browser of any user who visits the affected page, enabling session hijacking and account takeover. The issues have been fixed in n8n versions 2.10.1 and 1.123.21. 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 Webhook node by adding `n8n-nodes-base.webhook` 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 inyectar scripts arbitrarios en p\u00e1ginas renderizadas por la aplicaci\u00f3n n8n utilizando diferentes t\u00e9cnicas en varios nodos (nodo Form Trigger, nodo Chat Trigger, nodo Send & Wait, nodo Webhook y nodo Chat). Los scripts inyectados por un flujo de trabajo malicioso se ejecutan en el navegador de cualquier usuario que visite la p\u00e1gina afectada, lo que permite el secuestro de sesi\u00f3n y la toma de control de cuentas. Los problemas se han solucionado en las versiones de n8n 2.10.1 y 1.123.21. Los usuarios deben actualizar a una de estas versiones o posteriores para remediar la vulnerabilidad. Si la actualizaci\u00f3n no es posible de inmediato, los administradores deben considerar las siguientes mitigaciones temporales. Limite los permisos de creaci\u00f3n y edici\u00f3n de flujos de trabajo solo a usuarios de plena confianza, y/o deshabilite el nodo Webhook a\u00f1adiendo 'n8n-nodes-base.webhook' a la variable de entorno 'NODES_EXCLUDE'. Estas soluciones provisionales no remedian completamente el riesgo y solo deben utilizarse como medidas de mitigaci\u00f3n a corto plazo."}], "lastModified": "2026-03-04T03:24:40.543", "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"}