Does v0.dev add server-side validation?
v0.dev primarily generates client-side UI code and does not produce server-side validation logic for form submissions or API requests. Client-side validation created by v0 can be easily bypassed by attackers using browser developer tools or direct API calls. Any form fields, input constraints, or data type checks in v0-generated components exist only for user experience and provide no security guarantee. Developers must implement server-side validation separately in their API routes or server actions. UNPWNED can identify externally reachable endpoints and related controls, but server-side validation requires code review or targeted testing.
Check your v0.dev app now
Run free security scanLast reviewed: 2026-04-07. Based on publicly available security research and UNPWNED scan telemetry.
