CVE-2026-56358
MEDIUMn8n - Stored Cross-Site Scripting in Form Trigger Node
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GitHub Security Advisory (GHSA-q4fm-pjq6-m63g)
https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g
Third Party Advisory third-party-advisory
VulnCheck Advisory: n8n - Stored Cross-Site Scripting in Form Trigger Node
https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-trigger-node
Scores
CVSS v3
5.4
EPSS
0.0014
EPSS Percentile
4.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-79
Status
published
Products (7)
n8n/n8n
< 1.123.25 (2 CPE variants)
n8n/n8n
< 2.11.2
n8n/n8n
1.123.25
n8n/n8n
2.0.0-rc.0 - 2.11.2
n8n/n8n
2.11.2
npm/n8n
0 - 1.123.25npm
npm/n8n
2.0.0-rc.0 - 2.11.2npm
Published
Jun 24, 2026
Tracked Since
Jun 24, 2026