PT-2026-51782 · N8N · N8N

Tr4Ce-Ju · Published 2026-06-24 · Updated 2026-06-24 · CVE-2026-56358

Mitre

CVSS v3.1

5.4

Medium

Base vector

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

n8n before 1.123.25 (1.x) and before 2.11.2 (2.x), with the fix also included in 2.12.0, contains a stored cross-site scripting vulnerability in the Form Trigger node's CSS sanitization that allows authenticated users to inject malicious scripts. Attackers with workflow creation permissions can inject XSS payloads that execute persistently for all form visitors, enabling form hijacking and phishing attacks.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-56358

Affected Products

N8N

References · 3

• https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-56358 · Security Note
• https://vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-trigger-node · Note