CVE-2026-45582
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.
How to fix
- n8n-mcp n8n-mcp2.51.3 or later
- n8n-mcp2.51.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| n8n-mcp n8n-mcp | v < 2.51.3 | 2.51.3 |
| n8n-mcpnpm | v < 2.51.3 | 2.51.3 |
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Attack Surface Management
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