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Authentication

Is Clerk Safe?

Security analysis for apps built with Clerk. Drop-in authentication and user management with pre-built UI components and social login.

We scanned Clerk's website

Oct 5, 2026
B
82/100
10 issues found
SSL Certificate / HTTPS88/100
Security Headers79/100
Exposed Secrets100/100
JS Libraries100/100
Exposed Files100/100
Cross-Origin Requests0/100
Unsafe Redirects100/100
Email & DNS Protection83/100
Mixed Content (HTTP/HTTPS)100/100
Sitemap & Robots Leaks50/100
Brute Force Protection0/100
Error & Debug Info Leaks100/100
Clickjacking Protection100/100
Framework Security100/100

This is a scan of https://clerk.com. Your app built with Clerk may have different results.

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Common Security Issues in Clerk Apps

Exposed API Keys

AI coding tools often embed API keys directly in frontend JavaScript. If you're using Clerk, check that secret keys aren't in your client-side bundle.

Missing Security Headers

Headers like Content-Security-Policy, Strict-Transport-Security, and X-Frame-Options protect against XSS, clickjacking, and downgrade attacks.

Vulnerable Dependencies

Outdated npm packages with known CVEs are common in AI-generated code. Regular audits catch these before attackers do.

Authentication Weaknesses

Open registration endpoints, missing rate limiting, and exposed auth tokens are frequent issues in vibe-coded apps.

What ScanVibe Checks

✓SSL/TLS Configuration
✓Security Headers
✓Exposed Secrets & API Keys
✓Vulnerable Libraries
✓Exposed Files & Configs
✓Supabase Misconfigurations
✓Firebase Misconfigurations
✓Auth Endpoint Security

Frequently Asked Questions

Is Clerk safe to use?

Clerk itself is a reputable platform, but apps built with Clerk often have security misconfigurations — exposed API keys, missing security headers, and vulnerable dependencies. ScanVibe scans your app to find these issues.

What security issues do Clerk apps commonly have?

The most common issues we find in Clerk apps are: exposed API keys in frontend JavaScript, missing security headers (CSP, HSTS), outdated dependencies with known vulnerabilities, and misconfigured authentication endpoints.

How do I check if my Clerk app is secure?

Enter your app's URL in ScanVibe's scanner. We'll check for exposed secrets, security headers, vulnerable libraries, exposed files, and platform-specific misconfigurations — all in about 30 seconds.

Does ScanVibe scan Clerk specifically?

Yes. ScanVibe detects Clerk in your stack and runs platform-specific security checks in addition to our standard 8-category analysis.

Other Authentication to Check

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