Secure AI-Generated Apps: Auth, RBAC, and Payments
AI accelerates delivery, but generated code ships risks at machine speed. Use this focused checklist when your UI component generator, natural language programming prompts, or directory builder AI writes features faster than your reviews.
Identity and Authentication
- Centralize sign-in with OIDC/OAuth2; forbid ad-hoc JWT creation in templates. Enforce PKCE, nonce, and short token TTLs.
- Store secrets in a managed vault; prevent the generator from baking keys into components. Run static checks for credential literals.
- Multi-factor by policy: high-risk routes (payments, role admin) require step-up MFA via WebAuthn or TOTP.
- Session fixation: rotate session IDs on privilege change and after MFA. Set SameSite=Lax, HttpOnly, Secure cookies.
Authorization and RBAC
- Adopt a single policy engine (OPA/Cedar/Casbin). Block inline "if (isAdmin)" logic in scaffolded views.
- Model tenancy first: subject, resource, action, tenant. Write deny-by-default policies and test with table-driven cases.
- Enforce server-side checks for every API, even if the UI hides buttons. Generators often trust the client.
- Privilege lifecycle: approval workflows for role grants; time-boxed elevations; audit every decision with reason and request ID.
Payments and PCI Mindset
- Never handle raw card data in AI-produced code. Use tokenization and hosted fields from your PSP; add Content Security Policy to block card exfil.
- Idempotency keys on all charge/refund endpoints; store result hash to prevent duplicate transactions.
- Webhook hardening: verify signatures, constrain source IPs, and replay-protect with monotonic timestamps.
- Revenue authorization: require RBAC scopes for refunds, credits, and pricing changes; log the initiator, customer, amount, and linkage to the order.
Data Boundaries
- Schema-level row filters to enforce tenant isolation; pre-generate least-privilege queries rather than SELECT * patterns.
- Encrypt at rest with per-tenant keys when feasible; rotate via KMS and test restore drills quarterly.
- Mask secrets and PII in logs; block prompts from including production data when using natural language programming during debugging.
Supply Chain and Generation Controls
- Pin dependencies with checksums; scan SBOMs. Require human review for any code the directory builder AI scaffolds into admin or payment paths.
- Prompt hygiene: maintain a reviewed prompt library; forbid "auto-commit" agents. All generations run in ephemeral branches with CI security gates.
- Canary and kill-switches: feature flags for auth flows and payment providers; instant rollback without schema drift.
Treat AI as a junior engineer: fast, talented, and unsafe by default. Ship speed, keep receipts, and make security checks executable.
Testing and Monitoring
- Write abuse cases for prompts: fuzz the UI component generator outputs and assert failures, not silent passes.
- Chaos test auth: expire tokens mid-flow, rotate keys, and validate graceful degradation without leaking data.
- Observability: emit security metrics (denies, MFA prompts, webhook rejects) and alert on anomaly baselines.
- Run red team drills quarterly and fix findings within security SLOs and windows.
