At Inithouse — a studio shipping a growing portfolio of products in parallel — we audit vibecoded projects across security, performance, SEO, accessibility, and code quality. After reviewing dozens of AI-generated codebases, one pattern stands out: security is consistently the weakest area.
AI code generators produce functional code fast. But "functional" and "secure" are different conversations. Across our portfolio, we found that most vibecoded apps share the same four security gaps — and they're all fixable with specific, low-effort changes.
Mistake 1: No input validation by default
When you prompt an AI to "build a contact form" or "add a search feature," the generated code handles the happy path. What it rarely adds on its own: input sanitization, length limits, type checking, or protection against injection attacks.
We measured this across projects we audited at Audit Vibe Coding — over 70% of vibecoded forms had zero server-side validation beyond what the browser's required attribute provides.
