# CVE-2026-54378: VitaFit Cloud API broken access control in AWS credential issuance

Source: https://junglewise.ai/threats/cve-2026-54378-vitafit-cloud-api-before-2026-10-30-contained-a-broken-access  
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-2026-54378 · Severity: critical · CVSS 9.6 · Published 2026-11-04

VitaFit is a smart-scale platform with mobile apps that sync health measurements, account data, and user images to cloud services. An authenticated attacker can obtain temporary AWS credentials with overly broad permissions to read and modify other users' files in the shared storage bucket, enabling unauthorized cross-user data access and manipulation of health records and personal information.

Technologies: [Shenzhen Shine Industrial VitaFit Cloud API](https://junglewise.ai/threats/technologies/shenzhen-shine-industrial-vitafit-cloud-api). Vendors: [Shenzhen Shine Industrial](https://junglewise.ai/threats/vendors/shenzhen-shine-industrial).

## Quick answers

**Is CVE-2026-54378 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54378 being exploited in the wild.

**How severe is CVE-2026-54378?** Critical severity, with a CVSS score of 9.6, published 4 November 2026.

**Which products and versions are affected?** Shenzhen Shine Industrial VitaFit Cloud API before 2026-10-30.

**Is there a fix for CVE-2026-54378?** Yes: fixed in VitaFit Cloud API as of 2026-10-30. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54378 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-54378?** Check whether you run Shenzhen Shine Industrial VitaFit Cloud API 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 Cloud API as of 2026-10-30

## Technical details

The /front/user/s3/token/ endpoint issues temporary AWS credentials to any authenticated user without proper scoping, allowing attackers to list the shared storage bucket and access or overwrite other users' stored files. This is an insecure direct object reference (IDOR) vulnerability in the credential issuance logic. The vulnerability requires authentication but no further user interaction, and allows a lateral privilege escalation to access other users' sensitive data.

## Affected products

- Shenzhen Shine Industrial VitaFit Cloud API before 2026-10-30

## Timeline

- 2026-11-04: disclosed
- 2026-11-03: exploited: Responsible disclosure completed; no wild exploitation reported

## 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)

## Related threats

- [VitaFit cloud API information disclosure via unauthenticated search](https://junglewise.ai/threats/cve-2026-54383-vitafit-cloud-api-before-2026-10-30-contained-an-excessive-data)
- [VitaFit cloud API insecure direct object reference](https://junglewise.ai/threats/cve-2026-54377-vitafit-cloud-api-before-2026-10-30-contained-an-insecure-direct)