CVE-2026-55608 — n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode
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_TENA…
Published: 2026-07-15 · CVSS: 4.2 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7