The vulnerabilities described here align with the OWASP Top 10, the industry-standard list of the most critical web security risks, and MITRE CWE Top 25. Severity uses CVSS v3 scoring from NIST's National Vulnerability Database.
Platform-aware security audit for apps built with v0 by Vercel. What it covers, what it typically finds, and how to run one in 30 seconds.
Every v0 audit covers four dimensions — the same four we check on any live app. For v0 builds specifically, Security and Monitoring are where the most actionable findings concentrate.
NEXT_PUBLIC_ or referenced in client components are shipped in the browser bundle. CWE-312.next.config or middleware.v0 excels at UI generation, so the front-end is usually clean — the risk lives in the data/API layer it scaffolds and in what gets marked public.
None of these are flaws in v0 itself — they are standard production-hardening steps that require explicit decisions after code generation.
Based on AI-built apps scanned through launchreadycode.com and published research:
Paste your live URL at launchreadycode.com. No code access, no signup. You get a Launch Readiness Score /100 across all four dimensions plus the top findings.
The Launch Readiness Audit Report covers every finding with CVSS v3 severity, file references where applicable, and specific recommended fixes — engineer-verified, delivered within 48 hours.
A scan finds where you're weak. Exploit Proof tries to actually break in — an authorized 72-hour penetration test where you pay $297 only if we confirm a breach, and $0 (plus a signed certificate) if we can't.
npm audit (or pip-audit) and resolve all high/critical CVEs; enable automated dependency scanning.URL-based scan. No code access. No signup. Free Launch Readiness Score in 30 seconds.
Scan my v0 app — freev0 produces high-quality React/Next.js code, especially UI. The security gaps we see are in the API and auth layer: secrets marked public, route handlers without authorization, and missing rate limiting. All are standard hardening steps, fixable once identified.
Four dimensions: Security (exposed keys, authorization on route handlers/Server Actions, rate limiting, headers, CVEs), Reliability (error handling, graceful degradation), Performance (N+1 queries, bundle size), and Monitoring (error tracking, uptime, alerting). Methodology: OWASP Top 10, CWE Top 25, CVSS v3.
No. The scanner is URL-based — it tests what your live app exposes publicly, which is where attackers start. Paste your live URL and get a score in 30 seconds.
A free Launch Readiness Score is available at launchreadycode.com. The full audit report is $499 one-time; monitoring starts at $149/month. To prove exploitability with a real pen test, Exploit Proof charges $297 only on a confirmed breach.
The four dimensions and methodology are identical — the platform-specific checks differ. See also: Cursor security audit · Lovable security audit.
Sources: OWASP Top 10 2021; CWE Top 25 2024; CVSS v3; NVD CVE database; Veracode 2025 GenAI Code Security Report. General security guidance, not a certification or guarantee. v0 is a product of Vercel.
Compliance Wing
Security fixed. Now check your compliance.
EU AI Act enforcement is now live — fines up to €15M or 3% of global turnover for undisclosed AI systems. GDPR, SOC 2 foundations, and ISO 27001 foundations are separate obligations a security scan does not cover. One additional scan, 60 checks, 3 minutes. $799 — credited toward full implementation if you need it.
Run Compliance Score — $799 →Answers to what founders and engineers ask us most.
What security issues do apps built with v0.dev have?
The pattern we see most in v0 apps: secret keys marked public that should be server-only, API route handlers without authorization checks, and missing rate limiting. v0 produces high-quality React/Next.js UI code; the gaps are in the API and auth layer that sits behind it.
Is my v0 app ready to launch?
Verify your secrets aren't exposed as public environment variables, every API route and Server Action checks authorization (not just that a request arrived), and rate limiting covers auth and payment endpoints. A free scan at launchreadycode.com/free-scan checks all three on your live URL in about a minute.
Security audit for v0 apps
A v0 security audit checks four dimensions: security (exposed keys, authorization on route handlers and Server Actions, rate limiting, headers, dependency CVEs), reliability (error handling, graceful degradation), performance (N+1 queries, bundle size), and monitoring (error tracking, uptime alerts). v0's UI output is strong; these are the areas it doesn't cover.
How do I secure an app I built with v0.dev?
Move any secret marked NEXT_PUBLIC_ that shouldn't be public into a server-only environment variable, add authorization checks to every API route and Server Action, and add rate limiting to auth and payment endpoints. A free URL-based scan flags exactly which of these apply to your live app without needing your source code.
Is v0.dev safe for production use?
v0 produces high-quality React/Next.js code, especially for UI. Production-readiness is a separate layer: verify no secrets are marked public by mistake, API route handlers and Server Actions enforce authorization, and rate limiting exists. These are standard hardening steps, fixable once identified — not flaws in v0 itself.
v0.dev app security checklist
Checklist: (1) no secrets exposed via NEXT_PUBLIC_ environment variables that should be server-only, (2) every API route handler and Server Action checks authorization, (3) rate limiting on auth/payment/AI endpoints, (4) HTTP security headers set, (5) dependencies checked for known CVEs, (6) error tracking and uptime monitoring configured.
What does v0.dev not do for security?
v0 does not verify that environment variables marked public are meant to be public, does not add authorization checks to API route handlers or Server Actions, and does not add rate limiting or security headers. These sit outside what any AI UI generator configures — they're standard steps for whatever backend you connect.