CVE-2026-56354

n8n - Cross-Site Scripting and Open Redirect in Form Node

State: Published
Severity: 5.1 Medium
Published: Jul 10, 2026
Updated: Oct 29, 2026
Reserved: Jun 20, 2026

Description

n8n before 1.123.24, 2.10.4, and 2.12.0 (across its 1.x and 2.x branches) contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox policies. Authenticated users with workflow creation permissions can inject malicious scripts or redirect parameters to perform stored XSS attacks or phishing redirects against end users.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	4.1 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
n8nn8n	before 1.123.24Affected 1.123.24Not affected 2.0.0-rc.0 to before 2.10.4Affected 2.10.4Not affected 2.11.0 to before 2.12.0Affected 2.12.0Not affected
n8nn8n	2.0.0-rc.0 to before 2.10.4Affected 2.10.4Not affected
n8nn8n	before 1.123.24Affected 1.123.24Not affected

References

GitHub Security Advisory (GHSA-w673-8fjw-457c)vendor-advisory
VulnCheck Advisory: n8n - Cross-Site Scripting and Open Redirect in Form Nodethird-party-advisory

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