What security issues do v0.dev apps have?
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Short Answer
v0.dev apps surface a predictable distribution of issues: 0 critical-impact classes (none), 3 high-impact, 2 medium-or-below. The critical ones are what cause data breaches.
Detailed Answer
High-severity issues
- **XSS via dangerouslySetInnerHTML**: AI may suggest React patterns that render unsanitized user content.
- **Missing Input Validation**: v0 generates UI but not server-side validation logic.
- **Client-Side Auth Patterns**: UI-only auth flows that can be bypassed.
Medium/low-severity issues
- **Placeholder API Calls**: Generated code may include placeholder URLs or fake endpoints.
- **Outdated Dependencies**: Suggested packages may have known vulnerabilities.
Why these are the issues specific to v0.dev
v0.dev apps ship with a recognizable stack (supabase, firebase). The issue list above is what appears when you scan that specific combination. A Firebase-backed app would have a different top-5; a self-hosted Postgres deployment would have yet another. Context is everything.
What VAS checks in a v0.dev scan
- **XSS Prevention** — Checks generated components for proper escaping and sanitization of user input and dynamic content.
- **Secret Detection** — Scans for any API keys or secrets that may have been included in generated code examples.
- **Security Headers** — Verifies your deployed app has proper security headers configured.
- **Auth Patterns** — Reviews authentication and authorization patterns in generated code for common security issues.
Security Research & Statistics
of Lovable applications (170 out of 1,645) had exposed user data in the CVE-2025-48757 incident
Source: CVE-2025-48757 security advisory
average cost of a data breach in 2023
Source: IBM Cost of a Data Breach Report 2023
developers using vibe coding platforms like Lovable, Bolt, and Replit
Source: Combined platform statistics 2024-2025
Expert Perspectives
“There's a new kind of coding I call 'vibe coding', where you fully give in to the vibes, embrace exponentials, and forget that the code even exists.”
“It's not really coding - I just see stuff, say stuff, run stuff, and copy paste stuff, and it mostly works.”
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Get Starter ScanMore Questions About This Topic
Which v0.dev security issue is most dangerous?
XSS via dangerouslySetInnerHTML. AI may suggest React patterns that render unsanitized user content. This is the highest-impact finding because it tends to expose the full dataset or grant lateral movement in one step. The fix: Search for dangerouslySetInnerHTML. Sanitize all dynamic HTML with DOMPurify.
Are these issues unique to v0.dev, or do they appear across platforms?
The patterns overlap with bolt, lovable, cursor — all vibe-coding platforms share the "AI-generated code prioritizes functionality over security" problem. But the *specific manifestation* differs per platform. An exposed Supabase anon key is structurally different from an exposed Firebase config, which is different from an exposed Postgres connection string. The right scan is platform-aware.
How do I see which of these issues my v0.dev app has?
Run a VAS scan against your deployed v0.dev app URL. It checks every issue in the list above, confirms each by actually probing (not just reading headers), and prioritizes by severity with copy-paste fixes. Most v0.dev app scans return results in 2–3 minutes.
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