cap-go/capacitor-native-biometric Authentication Bypass

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

5.2 · CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-56294: 0.24% estimated exploitation activity in the next 30 days; percentile 14.50 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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: 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…

Published by the source

10 Feb 2026, 14:33 UTC

Last modified by the source

8 Jul 2026, 09:11 UTC

Source last checked

26 Oct 2026, 12:42 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vx5f-vmr6-32wf

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-vx5f-vmr6-32wf

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# Patch Next advisory brief: CVE-2026-56294

Advisory: cap-go/capacitor-native-biometric Authentication Bypass
IDs: CVE-2026-56294, GHSA-vx5f-vmr6-32wf
Record: https://patchnext.com/advisories/cve-2026-56294 (revision 3, source checked 26 Oct 2026, 12:42 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @capgo/capacitor-native-biometric 8.3.6. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @capgo/capacitor-native-biometric: affected < 8.3.6; fixed in 8.3.6

## Suggested inspection (read-only)
- `npm ls @capgo/capacitor-native-biometric --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @capgo/capacitor-native-biometric.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-vx5f-vmr6-32wf (OSV record GHSA-vx5f-vmr6-32wf lists affected ranges: npm @capgo/capacitor-native-biometric >=0 <8.3.6 (fixed))
- Verified: https://github.com/advisories/GHSA-vx5f-vmr6-32wf (GitHub-reviewed advisory GHSA-vx5f-vmr6-32wf lists affected ranges: npm @capgo/capacitor-native-biometric >=0 <8.3.6)

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