Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N | N8N | < 1.123.25 |
Related Weaknesses (CWE)
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63gMitigationVendor Advisory
- https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-triThird Party Advisory
FAQ
What is CVE-2026-56358?
CVE-2026-56358 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 au...
How severe is CVE-2026-56358?
CVE-2026-56358 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56358?
Check the references section above for vendor advisories and patch information. Affected products include: N8N N8N.