Best of 2026

What is the best security scanner for v0 apps?

Quick answer

The best security scanner for v0 apps tests the deployed site, not just the code. CheckVibe (from $0) leads for v0: 100+ live checks including the v0-signature failure modes, plus repository scanning — and pull-request reviews and AutoFix for teams. VibeEval, Vibe App Scanner, and Scanbee are strong alternatives.

TL;DR

v0 apps live on Vercel/Next.js where the failure modes are configuration-shaped (headers, env prefixes, unprotected API routes) — precisely what external scanning verifies fastest.
CheckVibe: free tier (4 scans/mo), solo plans $24–99/mo, Team from $25/seat/mo; scans the live app and the repository, with pull-request reviews and AutoFix on Team plans.
VibeEval ($19/mo, $199 lifetime) goes deepest on autonomous agent-based security testing.
Vibe App Scanner ($9–19 one-time) is the cheapest single pre-launch audit.
All picks verified against vendor sites on June 12, 2026 — sources at the bottom.

v0 generates excellent React/Next.js UI and exactly zero deployment hardening: no security headers (Vercel doesn't add them for you), no rate limiting on API routes or Server Actions, and the eternal `NEXT_PUBLIC_` trap — any env var with that prefix ships to the browser. The framework is solid; the configuration gaps are yours to find.

How we picked

Tests the deployed app from the outside (what attackers actually see), with v0 listed as a supported platform or stack-relevant coverage.
Catches the platform's signature failure modes, not just generic OWASP items.
Honest pricing with a usable free option where available.
Output a developer can act on — fix guidance, ideally AI-editor-ready.

The picks

1.CheckVibe

Free (4 scans/mo) · $24–99/mo · Team $25/seat/mo

Paste your deployed v0 URL and get 100+ security checks in about 30 seconds, no setup — and connect the GitHub or GitLab repo to scan the code too (SAST, dependencies, secrets). For v0/Next.js specifically: it verifies each security header, scans the bundle for leaked NEXT_PUBLIC_ secrets, and probes API routes — then outputs a ready-to-paste headers() block for next.config.js. Findings ship as copy-paste AI fix prompts, monitoring (uptime, threats) covers you after launch, and Team plans add pull-request security reviews and AutoFix pull requests.

Best for: Live-app + code security for teams building with AI, from $0

2.VibeEval

Free surface scan · $19/mo · $199 lifetime

Autonomous browser-agent security testing of the live app — including behind auth walls and CAPTCHAs (their claim). Security-only. Lists v0 as a supported platform.

Best for: Deep agent-based security testing

3.Vibe App Scanner

$9–19 one-time · $99/mo continuous

One-time security audits of the deployed app: exposed secrets, database access rules (Supabase/Firebase), headers, auth. No free scan tier listed as of June 2026. Lists v0 as a supported platform.

Best for: A cheap one-off pre-launch security audit

4.Scanbee

Free (3 targets, 20 scans/mo) · paid tiers listed "Coming Soon"

Five security scanner types — DAST, SAST, SCA, CSPM (AWS), vulnerability assessment — accepting both URLs and GitHub repos, with a native Supabase integration. Lists v0 as a supported platform.

Best for: Source + live + cloud security in one product

5.OWASP ZAP

Free, open source

The open-source standard for dynamic web app security testing. Extremely capable, entirely manual: you run it, configure it, and interpret the results. No vibe-coding-specific checks (no Supabase RLS probing, no AI-pattern detection).

Best for: Hands-on testing without a SaaS

Start with the free scan.

100+ security checks on your live app in about 30 seconds. Connect a repo and the code gets scanned too.

Run a free CheckVibe scan

FAQ

Do I really need a security scanner for a v0 app?

If the app has users, data, or payments — yes. AI-generated apps ship with a consistent set of gaps (exposed keys, missing access control, no headers), and every tool on this list catches issues a manual click-through never will. Start with a free scan; the result settles the question.

Are free security scans enough?

A free scan is enough to find out where you stand today. Paid tiers buy continuity (scheduled scans, monitoring, alerts) and depth (more pages crawled, more checks). For a side project, free-tier scans before each launch may genuinely suffice.

Does Vercel secure my v0 app automatically?

Vercel gives you TLS, DDoS basics, and isolated previews — but not security headers (CSP, HSTS, X-Frame-Options), not rate limiting, and it can't stop you shipping a secret in a NEXT_PUBLIC_ variable. Those are app-level concerns a scanner verifies.

What is the most common v0 security finding?

Missing security headers, followed by exposed NEXT_PUBLIC_ secrets. Both are five-minute fixes once identified — the scanners on this list all detect missing headers; bundle-level key scanning is where coverage differs.