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CVE-2026-55608

CVE-2026-55608 · n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant HTTP mode

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 4.2 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • n8n-mcp

    Versions
    • < 2.57.4: Affected

    No fix published

  • n8n-mcp npm

    Affected ranges
    • SEMVER: < 2.57.4

    Update to 2.57.4

Original sources

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