GHSA-vx5f-vmr6-32wf
There is a potential issue with the [cap-go/capacitor-native-biometric](https://github.com/Cap-go/capacitor-native-biometric) library. --- ## Summary The [cap-go/capacitor-native-biometric](https://github.com/Cap-go/capacitor-native-biometric) library was found to be subject to an authentication bypass as the current implementation of the `onAuthenticationSucceeded()` does not appear to handle a `CryptoObject`[^HackTricks1] [^SecuringBiometricAuthentication] as seen in the following code block starting from [line 88 in AuthActivity.java](https://github.com/Cap-go/capacitor-native-biometric/blob/main/android/src/main/java/ee/forgr/biometric/AuthActivity.java#L88): ```java @Override public void onAuthenticationSucceeded( @NonNull BiometricPrompt.AuthenticationResult result ) { super.onAuthenticationSucceeded(result); finishActivity("success"); } ``` As the current implementation only checks whether `onAuthenticationSucceeded()` was called and does not handle a `CryptoObject` the biometric authentication can be bypassed by hooking the `onAuthenticationSucceeded()` function. ## PoC Video: https://github.com/user-attachments/assets/b7b5a2bc-21dc-4373-b371-84b002dae7a7 ## Environment: The following steps were taken to create and deploy a Capacitor application using the `cap-go/capacitor-native-biometric library` for the purpose of verifying this finding. Note at the time of writing the `npx create-react-app` command broke, so I have provided two ways of creating and deploying the testing environment. Apparently React updated to version 19 caused a dependency issue as seen [here](https://github.com/facebook/create-react-app/issues/13715). If it is not fixed by the time you look at this PoC please use the yarn alternatives. 1. Create a new Capacitor app by opening your terminal and run the following commands to create a new Capacitor app. For the sake of the disclosure I'll be using the name `capgo-poc`: ```sh npx create-re
Properties
- ghsa_id
- GHSA-vx5f-vmr6-32wf
- severity
- medium
- summary
- cap-go/capacitor-native-biometric Authentication Bypass
- cve_id
- GHSA-vx5f-vmr6-32wf
- is_ghsa_only
- true
- ghsa_published
- 2026-02-10T14:33:50Z
- source_url
- https://github.com/advisories/GHSA-vx5f-vmr6-32wf
- ghsa_updated
- 2026-02-12T20:25:17Z
Related Entities (3)
AFFECTS (1)
HAS_WEAKNESS (1)
REPORTED_BY (1)
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