Authentication Bypass in @capgo/capacitor-native-biometric (CVE-2026-56294)
Summary
Authentication bypass in @capgo/capacitor-native-biometric (CVE-2026-56294). Confidential information can be exposed externally. Exploitable via CryptoObject. Mitigation: upgrade to 8.3.6 or later.
Original description
The description as published by the source.
There is a potential issue with the cap-go/capacitor-native-biometric library.
Summary
The 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:
@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 pr…
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-56294 has been found in @capgo/capacitor-native-biometric.
Attackers can target a specific entry point like CryptoObject over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 4.8/10.
What to do: upgrade @capgo/capacitor-native-biometric to 8.3.6 or later.
If unsure, ask your IT team or search "@capgo/capacitor-native-biometric CVE-2026-56294" on the vendor's site.
CVE-2026-56294 (@capgo/capacitor-native-biometric) — CWE-287 / CVSS v3 4.8
Attack vector: physical / unauthenticated / no user interaction
Attack surface: CryptoObject / com.capgo.poc / App.tsx
Patched: 8.3.6 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Authentication bypass (CWE-287) exists in @capgo/capacitor-native-biometric. Attackers reach the vulnerable code path via CryptoObject without authentication.
Check the vendor advisory for the affected versions of @capgo/capacitor-native-biometric. Attack surface: CryptoObject / com.capgo.poc / App.tsx.
Severity: Medium (CVSS 4.8/10). Confidential information can be exposed externally.
Update to 8.3.6.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r '@capgo/capacitor-native-biometric' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r '@capgo/capacitor-native-biometric' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
@capgo/capacitor-native-biometricを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade @capgo/capacitor-native-biometric to 8.3.6ステージング環境で 8.3.6 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web disclosure@vulncheck.com
- web nvd.nist.gov
- web github.com
- web github.com