Incorrect Authorization Affecting n8n-mcp package, versions <2.57.4
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 applicationsSnyk Learn
Learn about Incorrect Authorization vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-JS-N8NMCP-17981042
- published15 Jul 2026
- disclosed14 Jul 2026
- creditDavid Carliez
Introduced: 14 Jul 2026
NewCVE-2026-55608 (opens in a new tab)How to fix?
Upgrade n8n-mcp to version 2.57.4 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 Incorrect Authorization in the workflow_versions. An attacker can access or delete sensitive workflow-version backups by sending crafted requests in multi-tenant HTTP mode.
Note: This is only exploitable if the application is running with ENABLE_MULTI_TENANT=true and default-scope backups from a prior single-tenant deployment are present.
Workaround
This vulnerability can be mitigated by restricting network access to the HTTP endpoint (using firewall, reverse proxy, or VPN), running in stdio mode, or removing default-scope backups that are no longer needed.