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 โ such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters โ could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3.
Details
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| n8n-mcp | โ | โ |
| unknown | โ | โ |
References
Similar Threats
- High CVE-2026-45707
- High GHSA-8g7g-hmwm-6rv2
- High CVE-2026-44694
- High CVE-2026-42449
- Medium CVE-2026-42282
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