What’s Vulnerable › Vulnerabilities

CVE-2026-44694: n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-08 · updated 2026-10-26
• Weakness: CWE-367

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.

Affected products

• czlonkowski n8n-mcp: from 2.18.7 before 2.50.2 — fixed in 2.50.2

How to fix

Upgrade to a fixed version: czlonkowski n8n-mcp 2.50.2. Check the vendor advisory for mitigations.

References

• https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb
• https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2
• https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r

Get alerted when CVE-2026-44694 or the next vulnerability affects your stack