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 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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f	Patch
https://github.com/czlonkowski/n8n-mcp/pull/782	Issue Tracking Patch
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3	Product Release Notes
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-29 14:16

Updated : 2026-07-21 12:10

NVD link : CVE-2026-45582

Mitre link : CVE-2026-45582

CVE.ORG link : CVE-2026-45582

JSON object : View

Products Affected

n8n-mcp

n8n-mcp

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

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