Broken Access Control in VitaFit Cloud API Affects User Data Security
CVE-2026-54378

9.3CRITICAL

Key Information:

Vendor

Shenzhen Shine Industrial Co., Ltd.

Status
Vitafit
Vendor
CVE Published:
4 November 2026

Badges

👾 Exploit Exists

What is CVE-2026-54378?

The VitaFit Cloud API is susceptible to a broken access control issue, allowing any authenticated user to inadvertently gain temporary AWS credentials by invoking the POST /front/user/s3/token/ endpoint. This flaw enables attackers to exploit poorly scoped AWS credentials, granting them unauthorized access to shared storage buckets. Consequently, malicious users can view, manipulate, or overwrite data files belonging to other users, leading to potential data breaches and unauthorized cross-user data access.

Affected Version(s)

VitaFit 0 < 2026-10-30

References

https://github.com/je-lv/vitafit-security-research
technical-descriptionexploit
https://play.google.com/store/apps/details?id=com.vt.vitafit
product
https://www.vulncheck.com/advisories/vitafit-cloud-api-br...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jose Lomeli
.