---
id: CVE-2026-54378
title: VitaFit Cloud API Broken Access Control via S3 Token Endpoint
summary: >-
  VitaFit cloud API before 2026-10-30 contained a broken access control
  vulnerability that allows any authenticated user to obtain temporary AWS
  credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can
  use these improp…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-522
vendor: 'Shenzhen Shine Industrial Co., Ltd.'
product: VitaFit
affected:
  - VitaFit < 2026-10-30
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T22:09:16.025Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-54378'
references:
  - url: 'https://github.com/je-lv/vitafit-security-research'
    label: Researcher Disclosure
  - url: 'https://play.google.com/store/apps/details?id=com.vt.vitafit'
    label: Google Play
  - url: >-
      https://www.vulncheck.com/advisories/vitafit-cloud-api-broken-access-control-via-s3-token-endpoint
    label: >-
      VulnCheck Advisory: VitaFit Cloud API Broken Access Control via S3 Token
      Endpoint
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.637Z'
---

## Overview

VitaFit cloud API before 2026-10-30 contained a broken access control vulnerability that allows any authenticated user to obtain temporary AWS credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can use these improperly scoped credentials to list the shared storage bucket and read or overwrite other users' stored files, enabling unauthorized cross-user data access and manipulation.

## Affected

- `VitaFit < 2026-10-30`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.