CVE-2026-56354 | n8n before 1.123.24, 2.10.4, and 2.12.0 (across its 1.x and … | CVSS 4.1 MEDIUM

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.

Metadata

CVE ID: CVE-2026-56354
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-20 18:13 UTC
Published: 2026-07-10 13:57 UTC
Last updated: 2026-07-10 16:42 UTC
Primary CWE: CWE-79
Improper Neutralization of Input During Web Page Generation …
Vendor / Product: n8n / n8n
Sources: cve.org · NVD

Severity & Metrics

4.1 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (3)

Vendor	Product	Platform	Versions
n8n	n8n	—	0 < 1.123.24, 1.123.24, 2.0.0-rc.0 < 2.10.4, 2.10.4 …
n8n	n8n	—	0 < 2.10.4, 2.10.4
n8n	n8n	—	0 < 1.123.24, 1.123.24

Weakness (CWE)

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

CVSS scores (2)

Score	Severity	Version	Source	Vector
5.1	MEDIUM	4.0	cna	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
4.1	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N

References (2)

GitHub Security Advisory (GHSA-w673-8fjw-457c) https://github.com/n8n-io/n8n/security/advisories/GHSA-w673-8fjw-457c
VulnCheck Advisory: n8n - Cross-Site Scripting and Open Redirect in Form Node https://www.vulncheck.com/advisories/n8n-cross-site-scripting-and-open-redirect-in-form-node