PT-2026-30771 · Npm · N8N

Publicado 2026-03-27 · Atualizado 2026-03-27

OSV

CVSS v3.1

5.4

Média

Vetor base

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Impact

An authenticated user with permission to create or modify workflows could inject malicious JavaScript into the Custom CSS field of the Chat Trigger node. Due to a misconfiguration in the sanitize-html library, the sanitization could be bypassed, resulting in stored XSS on the public chat page. Any user visiting the chat URL would be affected.

Patches

The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

• Limit workflow creation and editing permissions to fully trusted users only.
• Disable the Chat Trigger node by adding @n8n/n8n-nodes-langchain.chatTrigger to the NODES EXCLUDE environment variable.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Correção

XSS

Enumeração de Fraquezas

CWE-79

Identificadores relacionados

GHSA-3C7F-5HGJ-H279

Produtos afetados

N8N

Referências · 3

• https://github.com/n8n-io/n8n · Nota
• https://github.com/n8n-io/n8n/security/advisories/GHSA-3c7f-5hgj-h279 · Nota
• https://osv.dev/vulnerability/GHSA-3c7f-5hgj-h279 · Aviso do Fabricante