Mobile App Security Best Practices in 2026

Short summary

Secure React Native/Expo apps by storing tokens in OS keychain, pinning certificates with backup pins, validating all untrusted inputs (deep links, WebView, push payloads), and automating security checks in CI with semgrep, npm audit, and MobSF. Review AI-generated auth and storage code with the same rigor as new contributor PRs; most mobile breaches stem from hardcoded keys or plaintext tokens.

• •Use OS keychain (expo-secure-store) for token storage, never AsyncStorage
• •Implement certificate pinning with backup pins and rotation plan; validate all external inputs
• •Automate CI security: semgrep, eslint-plugin-security, npm audit, MobSF on every release

Generated with AI, which can make mistakes.