What is CVE-2026-28766?

CVE-2026-28766 is a critical-severity vulnerability in Gardyn Cloud Api, classified under Missing Authentication for Critical Function. CVSS score: 9.3/10. Published 2026-04-03.

How severe is CVE-2026-28766?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Is CVE-2026-28766 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in Gardyn Cloud Api

CVE-2026-28766

A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.

Vulnerability class: Broken Authentication

EPSS: 0.001 (24.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N.

Affected products

Gardyn Cloud Api — versions 0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

Public proof-of-concept exploits

MichaelAdamGroberman/CVE-2026-28766

References

Frequently asked questions

What is CVE-2026-28766?: CVE-2026-28766 is a critical-severity vulnerability in Gardyn Cloud Api, classified under Missing Authentication for Critical Function. CVSS score: 9.3/10. Published 2026-04-03.
How severe is CVE-2026-28766?: Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2026-28766 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.