VULNERABILITY INTELLIGENCE

CVE-2026-45582

CVSS score6.5 MEDIUM

EPSS probability0.26%

CISA KEVNot currently listed

Published2026-05-29

Last modified2026-07-21

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

security-advisories@github.com: CWE-201

Primary references

security-advisories@github.com — Patch
security-advisories@github.com — Issue Tracking, Patch
security-advisories@github.com — Product, Release Notes
security-advisories@github.com — Mitigation, Vendor Advisory