Vulnerability Description
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLE_MULTI_TENANT=true could allow an authenticated tenant to access default-scope workflow_versions backups instead of being confined to the tenant scope, exposing or deleting workflow-version backups from prior single-tenant deployments or migrations. This issue is fixed in version 2.57.4.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N-Mcp | N8N-Mcp | < 2.57.4 |
Related Weaknesses (CWE)
References
- https://github.com/czlonkowski/n8n-mcp/commit/1f42899749ed0c584fb6b4fd63d75233c3Patch
- https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.57.4Release Notes
- https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-2cf7-hpwf-47h9MitigationVendor Advisory
FAQ
What is CVE-2026-55608?
CVE-2026-55608 is a vulnerability with a CVSS score of 4.2 (MEDIUM). n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLE_MULTI_TENANT=true could allow an ...
How severe is CVE-2026-55608?
CVE-2026-55608 has been rated MEDIUM with a CVSS base score of 4.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55608?
Check the references section above for vendor advisories and patch information. Affected products include: N8N-Mcp N8N-Mcp.