Security Scanner forv0 Apps
v0 generates polished Next.js components, but it skips auth middleware, sanitization, and security headers. ShipSafe catches what v0's AI leaves out.
The short answer
Beautiful Components, Missing Security
v0 by Vercel is excellent at generating UI components. It produces clean, accessible React code with proper TypeScript types and Tailwind styling. But it is fundamentally a component generator, not an application security tool.
The components look production-ready, but the security plumbing that makes them safe for production is consistently absent. Authentication, authorization, input validation, and security headers are your responsibility.
ShipSafe scans your entire Next.js codebase — tracing data flow from Server Components through to Client Components, checking every API route for auth middleware, and validating your security headers.
Common vulnerabilities
Common Vulnerabilities in v0 Projects
These patterns appear consistently in v0-generated Next.js applications we scan.
XSS in Dynamic Content
Criticalv0 generates React components that render user-provided content using dangerouslySetInnerHTML or by interpolating unsanitized values into the DOM. When that content comes from a database, URL parameters, or user input, attackers can inject scripts that steal sessions or exfiltrate data.
Missing Auth Middleware on API Routes
Criticalv0 generates Next.js API routes and Server Actions without authentication middleware. The generated route handlers process requests and return data without ever checking who is making the request. Any endpoint that reads or writes user data becomes publicly accessible.
Insecure or Missing Security Headers
Mediumv0 does not generate security headers like Content-Security-Policy, X-Frame-Options, or Strict-Transport-Security. Without these headers, your app is vulnerable to clickjacking, MIME-type sniffing attacks, and content injection.
Client-Side Data Exposure
Highv0 sometimes fetches full database records in Server Components and passes the entire object to Client Components, even when the UI only needs a few fields. Sensitive fields like email addresses, internal IDs, or role information end up serialized in the page's HTML.
How ShipSafe Secures Your v0 App
Connect Your v0 Project
Link your GitHub repo or paste your Next.js code. ShipSafe understands v0's component patterns, API routes, and Server Component data flow.
Next.js-Aware Security Scan
ShipSafe traces data from Server Components through Client Components, checks every API route for auth middleware, and validates security headers in your next.config.
Actionable Fix Report
Get severity-ranked findings with Next.js-specific fixes. Each issue includes the exact file, line number, and code change needed.
Frequently Asked Questions
v0 Built the UI. Did It Build the Security Layer?
Spoiler: it didn’t. Find out what’s missing before you deploy. Free scan, 2 minutes, no card.
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