n8n-mcp-server

Security Findings (38)

• CriticalArbitrary Code Execution

  n8n_execute_workflow:tool name or description implies arbitrary script/code execution (evaluate_script, execute javascript, etc.)

  Rule: AS-006Fix: This tool can execute arbitrary code or shell commands on the host system. Remove it unless strictly required. If kept: (1) restrict access to trusted users/agents only, (2) require human approval before each invocation (Claude Desktop: set approval_required: true; other clients: enable equivalent confirmation), (3) use the most restrictive sandbox or read-only mode available, and (4) never expose this tool to untrusted input sources.
• HighExcessive Permission Surface ×10

  • n8n_get_workflow:tool declares exec permission
  • n8n_delete_workflow:tool declares exec permission
  • n8n_activate_workflow:tool declares exec permission
  • n8n_deactivate_workflow:tool declares exec permission
  • n8n_execute_workflow:tool declares exec permission
  • n8n_list_executions:tool declares exec permission
  • n8n_get_execution:tool declares exec permission
  • n8n_delete_execution:tool declares exec permission
  • n8n_retry_execution:tool declares network permission
  • n8n_retry_execution:tool declares exec permission

  Rule: AS-002Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.
• HighInsecure Secret Handling

  n8n_get_credential_schema:input parameter "credentialType" appears to accept a secret or credential

  Rule: AS-010Fix: Avoid accepting raw credentials as input parameters. Use secret managers (e.g. 1Password CLI, AWS Secrets Manager) and ensure credentials are never logged or stored in agent traces.
• MediumExcessive Permission Surface ×15

  • n8n_create_workflow:tool declares fs permission
  • n8n_update_workflow:tool declares fs permission
  • n8n_delete_workflow:tool declares fs permission
  • n8n_update_workflow_tags:tool declares fs permission
  • n8n_delete_execution:tool declares fs permission
  • n8n_create_credential:tool declares fs permission
  • n8n_create_credential:tool declares db permission
  • n8n_update_credential:tool declares fs permission
  • n8n_delete_credential:tool declares fs permission
  • n8n_create_tag:tool declares fs permission
  • n8n_update_tag:tool declares fs permission
  • n8n_delete_tag:tool declares fs permission
  • n8n_get_user:tool declares fs permission
  • n8n_delete_user:tool declares fs permission
  • n8n_update_user_role:tool declares fs permission

  Rule: AS-002Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.
• LowDoS Resilience — Missing Rate Limit / Timeout ×9

  • n8n_get_workflow:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_delete_workflow:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_activate_workflow:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_deactivate_workflow:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_execute_workflow:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_list_executions:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_get_execution:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_delete_execution:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration
  • n8n_retry_execution:tool performs network or execution operations but declares no rate-limit, timeout, or retry configuration

  Rule: AS-011Fix: Declare explicit rate-limit, timeout, and retry configuration for all network and execution tools. Implement exponential back-off and surface resource state to the calling agent.
• LowExcessive Permission Surface ×2

  • n8n_activate_workflow:tool declares http permission
  • n8n_execute_workflow:tool declares http permission

  Rule: AS-002Fix: Tool requests broad permissions (exec/fs/network). Validate input parameters using Enums where possible, and restrict file system operations to explicit allowed directories.