AIKIDO-2026-210530
n8n-mcp is vulnerable to Incorrect Authorization
42
Medium Risk
This Affects:
n8n-mcpTL;DR
In multi-tenant HTTP mode, n8n-mcp resolves the tenant scope for its local workflow_versions backup storage from request-derived context. An authenticated tenant whose context resolved to the empty default scope could reach default-scope workflow-version backups instead of being confined to its own tenant, allowing those snapshots to be read or deleted. These backups may contain sensitive workflow configuration. The fix requires a complete tenant context and fails closed when the request maps to the empty default scope, and it rejects requests that supply only one of the tenant headers.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
n8n-mcp is vulnerable to Incorrect Authorization in versions 2.7.7 - 2.57.3.
How to fix this
Upgrade the n8n-mcp library to the patch version.
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SOC 2Compliant
ISO 27001Compliant