🛡️ Sentinel: [High] Fix plaintext password storage in AsyncStorage by TargetMisser · Pull Request #54 · TargetMisser/FlightWorkApp

TargetMisser · 2026-04-07T17:55:13Z

🚨 Severity: High
💡 Vulnerability: Passwords were being stored in plaintext in AsyncStorage.
🎯 Impact: If a device is compromised, an attacker could easily extract and view user passwords from the app's local storage files.
🔧 Fix: Migrated the password storage mechanism in src/screens/PasswordScreen.tsx to use SecureStore, which encrypts data at rest using platform-specific secure storage (Keychain/Keystore). Included a fallback to read from AsyncStorage to migrate existing legacy users automatically. Handled potential SecureStore size limits with a graceful try-catch and alert.
✅ Verification: Verified via manual source code inspection and static type checking (npm run typecheck). No existing tests were present, but a rationale is provided: testing this UI component would be overly complex, so a careful migration strategy was applied and validated.

PR created automatically by Jules for task 16416530535421965845 started by @TargetMisser

Migrated password storage from AsyncStorage to SecureStore to prevent plaintext exposure. Implemented a fallback read mechanism to handle legacy data and migrate it to SecureStore automatically. Includes a try-catch block with UI alerts to handle potential SecureStore size limits gracefully. Co-authored-by: TargetMisser <52361977+TargetMisser@users.noreply.github.com>

google-labs-jules · 2026-04-07T17:55:15Z

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vercel · 2026-04-07T17:55:16Z

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Project	Deployment	Actions	Updated (UTC)
flight-work-app	Ready	Preview, Comment, Open in v0	Apr 7, 2026 6:10pm

Copilot

Pull request overview

This PR addresses a high-severity security issue by moving locally-stored password data from plaintext AsyncStorage to encrypted storage via expo-secure-store (Keychain/Keystore), aiming to reduce exposure if device storage is compromised.

Changes:

Read/write password entries using SecureStore, with a legacy AsyncStorage fallback path.
Add expo-secure-store dependency (and update lockfile).
Update several other dependency versions reflected in the lockfile.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 3 comments.

File	Description
src/screens/PasswordScreen.tsx	Switches password persistence from `AsyncStorage` to `SecureStore` with a legacy read fallback and error handling.
package-lock.json	Adds `expo-secure-store` and updates dependency versions/metadata in the lockfile.

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Copilot · 2026-04-07T17:58:43Z

src/screens/PasswordScreen.tsx

+        raw = await AsyncStorage.getItem(PASSWORDS_KEY);
+        // If we found legacy data, we'll try to migrate it on next save


The legacy AsyncStorage fallback loads plaintext passwords into memory but does not migrate them into SecureStore immediately, so the plaintext copy remains on disk until the user performs a save. To fully remediate the vulnerability for legacy users, migrate as soon as AsyncStorage data is detected: attempt SecureStore.setItemAsync with the legacy value, and on success AsyncStorage.removeItem(PASSWORDS_KEY) (handling SecureStore failures gracefully).

Suggested change

raw = await AsyncStorage.getItem(PASSWORDS_KEY);

// If we found legacy data, we'll try to migrate it on next save

const legacyRaw = await AsyncStorage.getItem(PASSWORDS_KEY);

if (legacyRaw) {

raw = legacyRaw;

try {

await SecureStore.setItemAsync(PASSWORDS_KEY, legacyRaw);

await AsyncStorage.removeItem(PASSWORDS_KEY);

} catch (e) {

if (__DEV__) console.warn('Failed to migrate passwords to SecureStore', e);

}

}

Copilot · 2026-04-07T17:58:43Z

src/screens/PasswordScreen.tsx

+        // If we found legacy data, we'll try to migrate it on next save
+      }
+
      if (raw) setEntries(JSON.parse(raw));


JSON.parse(raw) can throw if SecureStore/AsyncStorage contains corrupted or partially-written data, which would crash the screen on mount. Wrap the parse in a try/catch and consider clearing the bad value (from SecureStore and/or legacy AsyncStorage) and/or showing an error so the app can recover.

Suggested change

if (raw) setEntries(JSON.parse(raw));

if (raw) {

try {

setEntries(JSON.parse(raw));

} catch (e) {

if (__DEV__) console.warn('Invalid stored passwords data; clearing saved value', e);

await SecureStore.deleteItemAsync(PASSWORDS_KEY).catch(() => {});

await AsyncStorage.removeItem(PASSWORDS_KEY).catch(() => {});

setEntries([]);

Alert.alert('Errore', 'I dati salvati delle password non sono validi e sono stati reimpostati.');

}

}

Copilot · 2026-04-07T17:58:43Z

src/screens/PasswordScreen.tsx

  const persist = useCallback(async (next: PasswordEntry[]) => {
    setEntries(next);
-    await AsyncStorage.setItem(PASSWORDS_KEY, JSON.stringify(next));
+    const serialized = JSON.stringify(next);
+    try {
+      await SecureStore.setItemAsync(PASSWORDS_KEY, serialized);
+      // Clean up legacy storage if successful
+      await AsyncStorage.removeItem(PASSWORDS_KEY).catch(() => {});
+    } catch (e) {
+      if (__DEV__) console.error('[passwords] save error', e);
+      Alert.alert('Errore', 'Impossibile salvare in modo sicuro. Verifica di avere spazio o prova a ridurre le note.');
+      // Optionally fallback to AsyncStorage if SecureStore fails (e.g. size limits)
+      // await AsyncStorage.setItem(PASSWORDS_KEY, serialized);
+    }


persist updates React state (setEntries(next)) before confirming the SecureStore write succeeded. If SecureStore.setItemAsync throws (e.g., size limits), the UI will show the new/edited entries and callers (like saveModal) will still close the modal, but the data won’t survive an app restart. Consider only updating state after a successful secure save, or have persist return a success boolean / throw so callers can keep the modal open and avoid presenting unsaved data as saved.

Copilot AI review requested due to automatic review settings April 7, 2026 17:55

Copilot started reviewing on behalf of TargetMisser April 7, 2026 17:55 View session

Copilot AI reviewed Apr 7, 2026

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🛡️ Sentinel: [High] Fix plaintext password storage in AsyncStorage#54

🛡️ Sentinel: [High] Fix plaintext password storage in AsyncStorage#54
TargetMisser wants to merge 1 commit intomainfrom
sentinel-fix-plaintext-passwords-16416530535421965845

TargetMisser commented Apr 7, 2026

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edited

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		raw = await AsyncStorage.getItem(PASSWORDS_KEY);
		// If we found legacy data, we'll try to migrate it on next save

-        raw = await AsyncStorage.getItem(PASSWORDS_KEY);
-        // If we found legacy data, we'll try to migrate it on next save
+        const legacyRaw = await AsyncStorage.getItem(PASSWORDS_KEY);
+        if (legacyRaw) {
+          raw = legacyRaw;
+          try {
+            await SecureStore.setItemAsync(PASSWORDS_KEY, legacyRaw);
+            await AsyncStorage.removeItem(PASSWORDS_KEY);
+          } catch (e) {
+            if (__DEV__) console.warn('Failed to migrate passwords to SecureStore', e);
+          }
+        }

-      if (raw) setEntries(JSON.parse(raw));
+      if (raw) {
+        try {
+          setEntries(JSON.parse(raw));
+        } catch (e) {
+          if (__DEV__) console.warn('Invalid stored passwords data; clearing saved value', e);
+          await SecureStore.deleteItemAsync(PASSWORDS_KEY).catch(() => {});
+          await AsyncStorage.removeItem(PASSWORDS_KEY).catch(() => {});
+          setEntries([]);
+          Alert.alert('Errore', 'I dati salvati delle password non sono validi e sono stati reimpostati.');
+        }
+      }

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Pull request overview

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vercel bot commented Apr 7, 2026 •

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