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.
Affected products
n8n-mcp: n8n-mcp
References3
- github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-2cf7-hp… MitigationVendor Advisory
- github.com/czlonkowski/n8n-mcp/commit/1f42899749ed0c584fb6b4fd6… Patch
- github.com/czlonkowski/n8n-mcp/releases/tag/v2.57.4 Release Notes
Metrics
- CVSS 3.1
-
5.4
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 21 · as of 15 November 2026
- CWE
- CWE-200CWE-863
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