CVE-2026-56354

EUVD-2026-42887
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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.1 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 14.63%
Affected Products (NVD)
VendorProductVersion
n8nn8n
𝑥
< 1.123.24
n8nn8n
𝑥
< 1.123.24
n8nn8n
2.0.0 ≤
𝑥
< 2.10.4
n8nn8n
2.10.0 ≤
𝑥
< 2.10.4
n8nn8n
2.11.0 ≤
𝑥
< 2.12.0
n8nn8n
2.11.0 ≤
𝑥
< 2.12.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/n8n-io/n8n/security/advisories/GHSA-w673-8fjw-457c
https://www.vulncheck.com/advisories/n8n-cross-site-scripting-and-open-redirect-in-form-node