What is the best security scanner for v0 apps?
The best security scanner for v0 apps tests the deployed site, not just the code. CheckVibe (from $0) leads for v0: 100+ checks including the v0-signature failure modes, plus SEO/AEO scanning no competitor offers. VibeEval, Vibe App Scanner, and Scanbee are strong security-only options.
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), $24–59/mo paid; the only option that also scans SEO + AEO visibility.
- 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 and crawlers 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 vibe coder can act on — fix guidance, ideally AI-editor-ready.
The picks
1.CheckVibe
Free (4 scans/mo) · $24–59/moPaste your deployed v0 URL and get 100+ security checks plus 68 SEO and 46 AEO checks in about 30 seconds — no repo access, no setup. 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, and monitoring (uptime, vitals, threats) covers you after launch.
Best for: All-in-one security + visibility, from $0
2.VibeEval
Free surface scan · $19/mo · $199 lifetimeAutonomous 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 continuousOne-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 sourceThe 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, 68 SEO checks, 46 AEO checks. One URL, about 30 seconds.
Run a free CheckVibe scanFAQ
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.
Keep reading
Sources
Pricing and feature claims verified against these pages on June 12, 2026.