Vulnerability Description
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an authenticated tenant to read workflow version snapshots belonging to other tenants and delete or destroy other tenants' stored backups, including full node definitions, credential references, and authorization headers. This issue is fixed in version 2.56.1.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| N8N-Mcp | N8N-Mcp | < 2.56.1 |
Related Weaknesses (CWE)
References
- https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.56.1Release Notes
- https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-j6r7-6fhx-77wxMitigationVendor Advisory
FAQ
What is CVE-2026-54052?
CVE-2026-54052 is a vulnerability with a CVSS score of 9.9 (CRITICAL). n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=...
How severe is CVE-2026-54052?
CVE-2026-54052 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-54052?
Check the references section above for vendor advisories and patch information. Affected products include: N8N-Mcp N8N-Mcp.