--- title: "Security Scanner for v0 Apps | ShipSafe" description: "Find XSS, missing auth middleware, insecure headers, and client-side data exposure in v0-generated Next.js apps. ShipSafe scans your v0 project for vulnerabilities." doc_version: 2026-09-22 last_updated: 2026-09-22T12:09:37.623Z canonical: https://ship-safe.co/for/v0 --- # Security Scanner for v0 Apps | 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. [See What v0 Missed](https://ship-safe.co/)[View Pricing](https://ship-safe.co/pricing) Free scan2 minutesNo card needed shipsafe / v0 scanwhat we screen for Most common in v0 repos 4recurring findings we screen for Critical02 High01 Medium01 Every finding ships with a plain-English fix. ![](https://ship-safe.co/_next/image?url=%2Fmascot%2Fbosun-spyglass.jpg&w=256&q=75&dpl=dpl_3ZzHUvLAtgffbaoJaX6LTRpYcFUU) 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. 1. 01 ### XSS in Dynamic Content Critical 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. 2. 02 ### Missing Auth Middleware on API Routes Critical 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. 3. 03 ### Insecure or Missing Security Headers Medium 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. 4. 04 ### Client-Side Data Exposure High 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 Verifies 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. [Scan My v0 App Free](https://ship-safe.co/scan) No credit card required. [See all plans](https://ship-safe.co/pricing) This is an independent comparison provided for informational purposes. All product names, logos, and brands are the property of their respective owners; ShipSafe is not affiliated with, endorsed by, or sponsored by them. Statements about other products reflect publicly available information at the time of writing and may change, so please verify current details on each provider’s own website. ## Sitemap Every page of this site, in markdown: [https://ship-safe.co/sitemap.md](https://ship-safe.co/sitemap.md)