7 Areas to Audit and Harden in Your React Native App
These are the most common React Native security gaps we see. Each item is tagged by effort level—Quick (config/audit only), Moderate (code change + app resubmission), or Involved (architecture decisions, phased rollout). Check them off as you go.
Run npm audit or use our free scanner. Focus on critical and high severity issues first. Remove packages you're not actually using—every dependency is attack surface.
npm audit fix handles most non-breaking updates. For major version bumps, you'll need testing and a release cycle.
Search your codebase for API keys, tokens, and credentials. They get bundled into your app binary and can be extracted by anyone who downloads your app.
Use react-native-config for environment variables. For truly sensitive data, fetch from your backend after authentication.
Prevent man-in-the-middle attacks by pinning your API's SSL certificate. Without this, attackers on the same network can intercept your API traffic.
Use react-native-ssl-pinning or configure pinning in your native network layer. Requires testing across both platforms and a release cycle. Plan for certificate rotation.
AsyncStorage is not encrypted. Anyone with device access (or a backup) can read it in plain text.
Use react-native-keychain (iOS Keychain / Android Keystore) for sensitive data. It's encrypted at the OS level.
Debug builds expose your app to remote debugging, performance profiling, and inspection tools that reveal your app's internals.
__DEV__ flag is falseCompromised devices can bypass your app's security controls. Users on rooted/jailbroken devices may have malware or tools that can extract data from your app.
Add jail-monkey or react-native-device-info to detect compromised devices. The code is straightforward—the hard part is deciding your policy (warn, limit, or block) and handling edge cases. May require stakeholder input and UX design for the blocked state.
Malicious apps or websites can craft deep links to trigger unintended actions in your app. Treat all deep link data as untrusted input.
Enable ProGuard/R8 for Android and ensure Bitcode is enabled for iOS. Code obfuscation makes reverse engineering harder. It's not bulletproof, but it significantly raises the bar for attackers trying to understand your app's logic.
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These quick wins address the low-hanging fruit. For a comprehensive security audit — dependency upgrades, vulnerability remediation, architecture review — let's talk.
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