| Component | n8n |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| Published (NVD) | 2026-06-24 |
| Last modified | 2026-06-26 |
| Affected versions | n8n < 1.123.25 n8n >= 2.0.0, < 2.11.2 |
| Fixed in | 1.123.25, 2.11.2 |
| Weakness | CWE-79 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
1.123.25or later (or the patched release of your branch: 2.11.2). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-56358
- https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g
- https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-trigger-node
Read more
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