PT-2026-30780 · 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 exploit a flaw in the Form Trigger node's CSS sanitization to store a cross-site scripting (XSS) payload. The injected script executes persistently for every visitor of the published form, enabling form submission hijacking and phishing. The existing Content Security Policy prevents direct n8n session cookie theft but does not prevent script execution or form action manipulation.

Patches

The issue has been fixed in n8n versions 2.12.0, 2.11.2, and 1.123.25. 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 Form Trigger node by adding n8n-nodes-base.formTrigger 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-Q4FM-PJQ6-M63G

Produtos afetados

N8N

Referências · 3

• https://github.com/n8n-io/n8n · Nota
• https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g · Nota
• https://osv.dev/vulnerability/GHSA-q4fm-pjq6-m63g · Aviso do Fabricante