# CVE-2026-56294: capacitor-native-biometric - Authentication Bypass via Unvalidated CryptoObject in onAuthenticationSucceeded

> Attackers can bypass biometric authentication in Capacitor apps by hooking the success callback, allowing unauthorized access without valid credentials.

- **Severity:** Medium 4.3 (`CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Jun 2026
- **Updated:** 8 Oct 2026
- **Also known as:** GHSA-58pv-hg46-37r9, GHSA-vx5f-vmr6-32wf

## What is CVE-2026-56294?

CVE-2026-56294 is a medium-severity authentication bypass vulnerability in capacitor-native-biometric, published on 20 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

capacitor-native-biometric before 12.128.2 contains an authentication bypass vulnerability where the onAuthenticationSucceeded() method fails to validate CryptoObject parameters. Attackers can hook the onAuthenticationSucceeded() function using dynamic instrumentation to bypass biometric authentication without valid credentials.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-56294?

2 open source packages ship an affected version, including @capgo/capacitor-native-biometric.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `@capgo/capacitor-native-biometric` | npm | All versions | 8.3.6 |
| `@capgo/capacitor-native-biometric` | npm | All versions | 8.3.6 |

## How do I fix CVE-2026-56294?

Upgrade @capgo/capacitor-native-biometric to 8.3.6 or later.

## Is CVE-2026-56294 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56294 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56294 and fix it if it is affected.

What it is: CVE-2026-56294 is a medium-severity authentication bypass vulnerability in capacitor-native-biometric, published on 20 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56294 exists.

Affected packages and fixed versions:
- @capgo/capacitor-native-biometric (npm): affected all versions; fixed in 8.3.6
- @capgo/capacitor-native-biometric (npm): affected all versions; fixed in 8.3.6

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-56294/ (Markdown: https://insights.sbomify.com/CVE-2026-56294/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56294
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56294
- OSV: https://osv.dev/vulnerability/CVE-2026-56294

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56294/
Summaries are generated and may contain mistakes; the official description above is the record.