Insertion of Sensitive Information Into Sent Data Affecting n8n-mcp package, versions <2.51.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-N8NMCP-17223767
- published7 Jun 2026
- disclosed18 May 2026
- creditu-ktdi
Introduced: 18 May 2026
CVE-2026-45582 (opens in a new tab)How to fix?
Upgrade n8n-mcp to version 2.51.3 or higher.
Overview
n8n-mcp is an Integration between n8n workflow automation and Model Context Protocol (MCP)
Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data in the telemetry sanitization process in event-validator.ts. An operator with access to the telemetry backend can access fragments of URL parameters, exposing confidential information such as customer or tenant identifiers, short secrets in query strings, or signed request parameters. Workflow execution data and credentials are not exposed.
Workaround
This vulnerability can be avoided by setting the environment variables N8N_MCP_TELEMETRY_DISABLED, TELEMETRY_DISABLED, or DISABLE_TELEMETRY to true.