# CVE-2026-54376: VitaFit Android insecure custom URI scheme token interception

Source: https://junglewise.ai/threats/cve-2026-54376-vitafit-android-application-com-vt-vitafit-before-2-8-1-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-04. Updated: 2026-11-04  
License: CC BY 4.0 with a link back

CVE-2026-54376 · Severity: high · CVSS 8.2 · Published 2026-11-04

VitaFit is a fitness tracking application that syncs health measurements like weight and body fat to cloud services. The app before version 2.8.1.0 uses an insecure login callback mechanism that allows a malicious app to intercept Fitbit authentication tokens, giving attackers read, create, and delete access to a victim's weight and body-fat records stored in the Fitbit service.

Vendors: [Shenzhen Shine Industrial](https://junglewise.ai/threats/vendors/shenzhen-shine-industrial).

## Quick answers

**Is CVE-2026-54376 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54376 being exploited in the wild.

**How severe is CVE-2026-54376?** High severity, with a CVSS score of 8.2, published 4 November 2026.

**Which products and versions are affected?** Shenzhen Shine Industrial VitaFit Android before 2.8.1.0.

**Is there a fix for CVE-2026-54376?** Yes: fixed in VitaFit 2.8.1.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54376 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-54376?** Check whether you run Shenzhen Shine Industrial VitaFit Android at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in VitaFit 2.8.1.0

## Technical details

The vulnerability is an insecure custom URI scheme (vitafit://vtio.cn) used for OAuth callback handling in the Fitbit integration. A malicious application can register the same URI scheme to intercept the 30-day Fitbit authorization token containing weight scope delivered in the callback URL, gaining access to the victim's Fitbit Body API. This is a local attack requiring the user to trigger the Fitbit login flow while the malicious app is installed, but no elevated privileges are needed.

## Affected products

- Shenzhen Shine Industrial VitaFit Android before 2.8.1.0

## Timeline

- 2026-11-04: disclosed
- 2026-11-03: patched: VitaFit 2.8.1.0 released

## References

- [https://github.com/je-lv/vitafit-security-research](https://github.com/je-lv/vitafit-security-research)
- [https://play.google.com/store/apps/details?id=com.vt.vitafit](https://play.google.com/store/apps/details?id=com.vt.vitafit)