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ShipSafe

ShipSafe
ShipSafe
v0 generates components, not security layers

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.

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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.

Critical

XSS in Dynamic Content

v0 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.

Critical

Missing Auth Middleware on API Routes

v0 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.

Medium

Insecure or Missing Security Headers

v0 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.

High

Client-Side Data Exposure

v0 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

1

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.

2

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.

3

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

Is v0 code secure?
v0 generates beautiful, functional Next.js components, but it consistently omits security measures. Auth middleware, input sanitization, security headers, and proper data scoping are rarely included in generated code. Always scan before deploying v0-generated code to production.
What vulnerabilities does v0 introduce?
The most common are: XSS through unsanitized dynamic content, missing authentication on API routes and Server Actions, absent security headers (CSP, HSTS, X-Frame-Options), and over-fetched data that exposes sensitive fields to the client.
How do I secure v0-generated Next.js code?
Run a ShipSafe scan first to identify all issues. Then: add auth middleware to all API routes and Server Actions, sanitize any user input before rendering, configure security headers in next.config.js, and select only the fields you need when passing data to Client Components.
Does ShipSafe understand Next.js Server Components?
Yes. ShipSafe traces the data flow from Server Components through to Client Components, identifying where sensitive data crosses the server-client boundary. It understands RSC payloads, Server Actions, and the Next.js middleware chain.

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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