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CVE-2026-45582

CVE-2026-45582 · n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 6.5 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n-mcp

    Versions
    • < 2.51.3: Affected

    No fix published

  • n8n-mcp npm

    Affected ranges
    • SEMVER: < 2.51.3

    Update to 2.51.3

Original sources

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