What is CVE-2026-54384?

CVE-2026-54384 is a critical-severity vulnerability in Shenzhen Shine Industrial Co., Ltd. Vitafit, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-11-04.

How severe is CVE-2026-54384?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Shenzhen Shine Industrial Co., Ltd. Vitafit

CVE-2026-54384

VitaFit cloud API before 2026-10-30 contained an authentication bypass vulnerability that allows remote attackers to obtain a full session for a victim's account by submitting a linked Google or Facebook account identifier to the POST /front/login/sns/ endpoint without providing proof of ownership from the identity provider. Attackers can forge a login using an identifier exposed through account enumeration to read and modify the victim's profile and delete the account's authentication record, preventing the legitimate user from logging in.

Published 2026-11-04 · last modified 2026-11-05.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Shenzhen Shine Industrial Co., Ltd. Vitafit

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

Researcher Disclosure (technical-description, exploit)
Google Play (product)
VulnCheck Advisory: VitaFit Cloud API Authentication Bypass via POST /front/login/sns/ (third-party-advisory)

Frequently asked questions

What is CVE-2026-54384?: CVE-2026-54384 is a critical-severity vulnerability in Shenzhen Shine Industrial Co., Ltd. Vitafit, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-11-04.
How severe is CVE-2026-54384?: Critical severity. CVSS v3 base score is 9.8 out of 10.