Ngrok - OpenClaw Local Exposure

Basic Information

• Company/Brand: ngrok
• Official Website: https://ngrok.com
• Type: Local Tunnel/Webhook Development Tool
• Price: Free tier available, paid version offers stable domains
• Related CVEs: CVE-2026-29613, CVE-2026-29606

Product Description

ngrok is a tunneling tool that exposes local services to the public internet, providing publicly accessible Webhook endpoints for OpenClaw. Within the OpenClaw ecosystem, ngrok is primarily used for development testing, Webhook reception, and integration scenarios requiring public URLs. ClawHub offers a dedicated ngrok integration skill.

Core Features

Webhook Skill

• Start a local Webhook server and open an ngrok tunnel
• Print public URL and endpoint path
• Received Webhooks are acknowledged with 200 OK
• Match webhookEvents declared by installed skills
• Automatically forward to local ports, execute configured Shell commands, or present to users for selection

Tunnel Manager

• Command-line tool for installing, configuring, and managing ngrok tunnels
• Automates authentication, tunnel creation, and lifecycle management
• Built-in traffic inspection (via ngrok Web Inspector)

Configuration

• Required: NGROK_AUTHTOKEN (obtained from dashboard.ngrok.com)
• Optional: NGROK_DOMAIN (stable ngrok domain for consistent URLs)

Security Vulnerabilities

CVE-2026-29613

• Webhook authentication bypass when OpenClaw Gateway is behind a reverse proxy (e.g., ngrok)
• Proxy connects to Gateway via loopback
• Unauthenticated remote requests may bypass configured Webhook passwords

CVE-2026-29606

• OpenClaw Twilio voice call Webhook authentication bypass
• Triggered when ngrok loopback compatibility is enabled
• Affects versions prior to OpenClaw 2026.2.14
• Upgrade to the latest version is required

Use Cases

• Rapid public URL generation in development and testing environments
• Webhook reception and integration testing
• Service integrations requiring publicly accessible endpoints
• Features requiring callback URLs, such as voice calls

Security Recommendations

• Use ngrok only in development and testing environments
• Not recommended as a long-term exposure solution in production environments
• Keep OpenClaw updated to version 2026.2.14 or later
• Properly configure Webhook authentication passwords
• Monitor access logs of ngrok tunnels
• Recommended alternatives for production environments: Cloudflare Tunnels or Tailscale

Relationship with the OpenClaw Ecosystem

ngrok is primarily positioned as a development and testing tool within the OpenClaw ecosystem, rather than a production deployment solution. While ngrok offers quick and convenient local exposure capabilities, the security vulnerabilities it introduces (CVE-2026-29613, CVE-2026-29606) highlight the risks of using such tools in production environments. The community recommends using more secure alternatives like Cloudflare Tunnels or Tailscale for production environments.