CVE WatchJul 21, 2026

CVE-2026-45582

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the work

CVSS

6.5

Medium

EPSS

0.3%

p18

KEV

—

Exploit Today

0-100

Published: May 29, 2026 · Last modified: Jul 21, 2026 · CWE-201

EPSS · 30d

0.3%EPSS · 30 days0.3%

2026-08-032026-08-31

Technical 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.

Official references

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