CVE-2026-56358CWE-79

n8n - Stored Cross-Site Scripting in Form Trigger Node

Medium · published June 24, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
14.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00243 · 14.6th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-24T11:53Z
EPSS history
Timeline
  • 24 JUN 11:53Z
    n8n - Stored Cross-Site Scripting in Form Trigger Node
    cvelistv5