# CVE-2026-54382: VitaFit Cloud API AWS IAM Misconfiguration via Cognito S3 Access

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

VitaFit cloud API before 2026-10-30 contained an improper access control vulnerability in its Cognito-issued AWS role that allows authenticated attackers to perform s3:PutObject operations across the entire shared bucket instead of being restricted to their own folder. Attackers can overwrite other users' objects in the shared S3 bucket using credentials obtained via CVE-2026-54378, destroying original content without triggering deletion protections.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Shenzhen Shine Industrial Co., Ltd. / VitaFit: ≥ 0; < 2026-10-30 (affected, date). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 7.7 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N; source: CNA: VulnCheck

- CVSS 4.0: 6.3 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 7.7 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-266

## Exploit evidence

- exploit: https://github.com/je-lv/vitafit-security-research (CNA: VulnCheck)

## References

- https://github.com/je-lv/vitafit-security-research (CNA: VulnCheck; technical-description, exploit)

- https://play.google.com/store/apps/details?id=com.vt.vitafit (CNA: VulnCheck; product)

- https://www.vulncheck.com/advisories/vitafit-cloud-api-aws-iam-misconfiguration-via-cognito-s3-access (CNA: VulnCheck; third-party-advisory)

- https://github.com/je-lv/vitafit-security-research (disclosure@vulncheck.com)

- https://play.google.com/store/apps/details?id=com.vt.vitafit (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/vitafit-cloud-api-aws-iam-misconfiguration-via-cognito-s3-access (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-54382; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-54382; retrieved 2026-11-05; source updated 2026-11-04

Revision: 6d49ee16ce7cbca408a4ba79b561a34a7277c03b1e6141345107cd1ac20671fd

Canonical: https://y2.dev/cve/CVE-2026-54382

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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