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GHSA-75hx-xj24-mqrw

GHSA-75hx-xj24-mqrw · n8n-mcp has unauthenticated session termination and information disclosure in HTTP transport

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### Summary Several HTTP transport endpoints in n8n-mcp lacked proper authentication, and the health check endpoint exposed sensitive operational metadata without credentials. ### Impact An unauthenticated attacker with network access to the n8n-mcp HTTP server could disrupt active MCP sessions and gather information useful for further attacks. ### Patches Fixed in **v2.47.6**. All MCP session endpoints now require Bearer authentication. The health check endpoint has been reduced to a minimal liveness response. ### Workarounds If you cannot upgrade immediately: - **Restrict network access** to the HTTP server using firewall rules, reverse proxy IP allowlists, or a VPN so that only trusted clients can reach it. - **Use stdio mode** (`MCP_MODE=stdio`) instead of HTTP mode. The stdio transport does not expose any HTTP endpoints and is unaffected by this vulnerability. Upgrading to v2.47.6 is still strongly recommended. ### Credit Reported by @yotampe-pluto.

CVSS 8.2 · Élevée · Correctif disponible

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Pile logicielle: node

Produits et versions concernés

  • n8n-mcp npm

    Plages de versions concernées
    • SEMVER: < 2.47.6

    Mettez à jour vers 2.47.6

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