CVE-2026-45582
Medium · 6.5CVSS
6.5
EPSS
0.5%
Published
May 29, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | n8n-mcp | 0 | 2.51.3 |
Related vulnerabilities
- GHSA-f3rg-xqjj-cj9w n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node… Same vulnerability
- CVE-2026-45707 n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation… Also affects n8n-mcp
- GHSA-jxx9-px88-pj69 n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant… Also affects n8n-mcp
- CVE-2026-42282 n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation… Also affects n8n-mcp
- CVE-2026-44694 n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation… Also affects n8n-mcp
- CVE-2026-41495 n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation… Also affects n8n-mcp
- GHSA-8g7g-hmwm-6rv2 n8n-mcp affected by path traversal, redirect-following SSRF, and telemetry payload… Also affects n8n-mcp
- GHSA-cmrh-wvq6-wm9r n8n-mcp webhook and API client paths has an authenticated SSRF Also affects n8n-mcp