Vulnerability Description
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N-Mcp | N8N-Mcp | < 2.51.3 |
Related Weaknesses (CWE)
References
- https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931Patch
- https://github.com/czlonkowski/n8n-mcp/pull/782Issue TrackingPatch
- https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3ProductRelease Notes
- https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9wMitigationVendor Advisory
FAQ
What is CVE-2026-45582?
CVE-2026-45582 is a vulnerability with a CVSS score of 6.5 (MEDIUM). n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of U...
How severe is CVE-2026-45582?
CVE-2026-45582 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45582?
Check the references section above for vendor advisories and patch information. Affected products include: N8N-Mcp N8N-Mcp.