The Risk of Shipping AI-Built Apps With Unresolved Dependency Vulnerabilities

AI has made it much faster to build apps, websites, SaaS products, admin tools, and internal systems. Faster development also means teams can ship insecure dependencies just as fast — often without realising it.

This post is for non-technical founders shipping with AI tools, new developers relying on AI-generated code, SaaS teams handling customer data, agencies moving quickly, and internal teams building dashboards, portals, and automation. One small habit prevents most of the avoidable risk:

npm audit

npm audit inspects your installed packages — direct and transitive — and reports known vulnerabilities in the dependency tree. That second part matters: most of your code is not code you wrote or code the AI generated. It is code pulled in by frameworks and libraries.

What happened in our case

We ran npm audit and it reported dependency vulnerabilities. npm audit fix cleared most of them automatically. One moderate finding remained:

postcss < 8.5.10
Severity: moderate
PostCSS has XSS via Unescaped </style> in its CSS Stringify Output

The vulnerable copy was not our top-level postcss. It was nested under next. Confirming that took one command:

npm ls postcss next

next was pulling in its own older PostCSS.

Why we did not use npm audit fix --force

npm suggested:

npm audit fix --force

The output showed the cost:

Will install next@9.3.3, which is a breaking change

That is a downgrade of a major framework across the entire app. It would clear the warning and break production. --force should be treated as a last resort, not a fix.

What we did instead

We used a targeted dependency override. In package.json:

"overrides": {
  "postcss": "8.5.16"
}

Then reinstalled and verified:

npm install
npm ls postcss next
npm audit --audit-level=moderate
npm run lint
npm run build
npm run typecheck

Result:

found 0 vulnerabilities

The overrides field forces every path in the tree — including nested copies inside frameworks — to resolve to the safe version, without touching the framework's major version.

A safe workflow

Do not ignore npm audit. Do not blindly --force it either. A repeatable sequence:

1. npm audit
2. npm audit fix for the automatic fixes
3. npm ls <vulnerable-package> to find where the bad copy lives
4. Decide: upgrade direct dependency, upgrade the framework, add an overrides entry, or document and monitor if no safe fix exists yet
5. Verify with npm run lint, npm run build, npm run typecheck, and your tests

Why this matters more for AI-built products

AI generates working code quickly. It does not guarantee the dependency tree is secure. Generated apps commonly:

• pin outdated packages
• install libraries the app never needs
• pull in vulnerable transitive dependencies
• pass local testing while still exposing real risk
• handle user data without any dependency hygiene at all

If your app touches logins, payments, uploads, student data, customer records, messages, or business workflows, dependency security is part of the product — not a nice-to-have.

Team policy

Make this part of the release path, not a one-off before launch:

• Run npm audit on every PR
• Never ship with unresolved high or critical vulnerabilities
• Investigate moderate findings that touch user input, rendering, auth, network, files, or server-side code
• Prefer overrides over --force when a nested dependency is the problem
• Commit package.json and package-lock.json together
• Re-run lint, build, typecheck, and important user flows after any dependency change

See the npm overrides documentation and the GitHub Advisory Database for the underlying data most scanners use.

Bottom line

npm audit is not just a developer command. It is a basic product safety check. In AI-assisted development, where the speed of building can easily hide the risk of insecure dependencies, that check is more important, not less.

Use AI to build faster. Use audit, lint, typecheck, and build to ship responsibly.