n8n-MCP
An MCP server that provides AI assistants with access to documentation, schemas, and operations for over 535 n8n workflow automation nodes. It enables models to understand, create, and manage n8n workflows through natural language by connecting to the n8n API.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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mohsin-zaheer
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
n8n Has an Arbitrary File Read via Git Node
n8n has Multiple Remote Code Execution Vulnerabilities in Merge Node AlaSQL SQL Mode
n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
n8n Has Expression Escape Vulnerability Leading to RCE
AUTH_TOKENAUTH_TOKEN_FILEBASE_URLCORS_ORIGINCOVERAGE_DIRCOVERAGE_REPORTERDISABLE_CONSOLE_OUTPUTFEATURE_TEST_COVERAGEGIT_COMMITHOSTLOG_LEVELMCP_MODEMCP_REQUEST_ACTIVEN8N_API_URL💡 Tip: If you’re running n8n locally on the same machine (e.g., via Docker), use http://host.docker.internal:5678 as the .N8N_CUSTOM_EXTENSIONSPUBLIC_URLTEST_ENVIRONMENTTEST_MAX_WORKERSTEST_PARALLELTEST_RETRY_ATTEMPTSTRUST_PROXYPORTTool 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.
Shell command execution
5 calls in production code run through a shell (src/utils/enhanced-documentation-fetcher.ts:81, src/utils/enhanced-documentation-fetcher.ts:87, src/utils/enhanced-documentation-fetcher.ts:567)
Prefer library functions over shell-outs. If you must shell out, ensure all inputs are properly escaped.
Production dependencies are patched
24 critical, 58 high severity in production deps — n8n@1.109.2 (critical), n8n@1.109.2 (critical)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
14 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
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