CVE-2026-55608

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 ENABLEMULTITENANT=true could allow an authenticated tenant to access default-scope workflowversions backups instead of being confined to...

n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode

Summary In multi-tenant HTTP mode ENABLEMULTITENANT=true, an authenticated tenant could, under certain conditions, reach n8n-mcp's local default-scope workflowversions backups instead of being confined to its own tenant scope. This affects n8n-mcp's own local workflow-version storage, not a norma...