CVE-2026-56354 PUBLISHED

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

Assigner: VulnCheck
Reserved: 20.06.2026 Published: 10.07.2026 Updated: 10.07.2026

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.

CVSS Vector: 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
CVSS Score: 5.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	Low
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
CVSS Score: 4.1

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	Low
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	n8n
Product	n8n
Versions	Default: unaffected affected from 0 to 1.123.24 (excl.) Version 1.123.24 is unaffected affected from 2.0.0-rc.0 to 2.10.4 (excl.) Version 2.10.4 is unaffected affected from 2.11.0 to 2.12.0 (excl.) Version 2.12.0 is unaffected

Vendor	n8n
Product	n8n
Versions	Default: unaffected affected from 0 to 2.10.4 (excl.) Version 2.10.4 is unaffected

Vendor	n8n
Product	n8n
Versions	Default: unaffected affected from 0 to 1.123.24 (excl.) Version 1.123.24 is unaffected

Credits

tCu0n9 reporter

References

Problem Types

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