| Component | n8n |
| Severity | critical (CVSS 9.1) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L |
| Published (NVD) | 2026-05-08 |
| Last modified | 2026-06-17 |
| Affected versions | n8n-mcp >= 2.18.7, < 2.50.2 |
| Fixed in | 2.50.2 |
| Weakness | CWE-367CWE-918 |
| CISA KEV | not listed |
NVD description
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.
What to do
- Upgrade n8n to
2.50.2or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-44694
- https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r
- https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb
- https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2
Read more
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