Failing Open Affecting n8n-mcp package, versions <2.51.2
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-N8NMCP-17223768
- published7 Jun 2026
- disclosed18 May 2026
- credit@u-ktdi
Introduced: 18 May 2026
CVE-2026-45707 (opens in a new tab)How to fix?
Upgrade n8n-mcp to version 2.51.2 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 Failing Open when handing multi-tenant HTTP requests (ENABLE_MULTI_TENANT=true) containing one or neither of the x-n8n-url and x-n8n-key headers. An operator can gain unauthorized access to workflows, executions, data-table contents, and credential metadata, and potentially escalate privileges to execute arbitrary code within the operator's environment because the absence of these headers falls back to associating the request with process-level credentials. This is only exploitable if the deployment is running in HTTP mode.