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.
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
History
01 Jun 2026, 18:41
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f - Patch | |
| References | () https://github.com/czlonkowski/n8n-mcp/pull/782 - Issue Tracking, Patch | |
| References | () https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3 - Product, Release Notes | |
| References | () https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w - Mitigation, Vendor Advisory | |
| First Time |
N8n-mcp n8n-mcp
N8n-mcp |
|
| CPE | cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:* |
29 May 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-29 14:16
Updated : 2026-06-01 18:41
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