A Model Context Protocol server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations, enabling them to understand and work with n8n's 525+ workflow automation nodes.
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vredrick
Source: Glama
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
N8N's Chat Trigger component is vulnerable to XSS
axios Vulnerable to Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`
AUTH_TOKENBASE_URLBUILD_DB_PATHCORS_ORIGINDISABLE_CONSOLE_OUTPUT"-e", "=true",GITHUB_ACTIONSGIT_COMMITHOSTIS_DOCKERLOG_LEVEL"-e", "=error",MCP_AUTH_TOKENMCP_MODE"-e", "=stdio",MCP_REQUEST_ACTIVEMCP_URLN8N_API_KEY"-e", "=your-api-key",N8N_API_URL"-e", "=https://your-n8n-instance.com",N8N_CUSTOM_EXTENSIONSN8N_CUSTOM_PATHN8N_MODULES_PATHSSE_ENABLEDUSE_FIXED_HTTPPORTTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
39/39 tools missing one or more hints — n8n_create_workflow (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); n8n_get_workflow (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); n8n_get_workflow_details (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +36 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool test coverage
Only 1/39 tools referenced in tests (3%)
Write tests that reference each tool by name so every tool has at least one test.
Shell command execution
29 child_process calls — runs shell commands
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Secrets stay with their owner
5 secret/sensitive values flow into network calls (N8N_API_URL → dynamic, N8N_API_URL → dynamic)
Audit where credentials are sent. A NOTION_TOKEN should only reach api.notion.com — never a third-party host.
Secrets not logged
2 secret values sent to console.log
Redact or omit secret values from log output.
Production dependencies are patched
0 critical, 16 high severity in production deps — @modelcontextprotocol/sdk@1.13.2 (high), @modelcontextprotocol/sdk@1.13.2 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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