CVE-2026-45582 — n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters
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…
Published: 2026-05-29 · CVSS: 6.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7