CVE-2026-28766

Gardyn Cloud API Missing Authentication for Critical Function

State: Published
Severity: 9.2 Critical
Published: Apr 3, 2026
Updated: Apr 7, 2026
Reserved: Mar 17, 2026

Description

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

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N	icscert
3.1	9.3 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N	icscert

Weaknesses

CWE-306

Affected Products

Product	Versions
Cloud APIGardyn	before 2.12.2026Affected

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-055-03
https://mygardyn.com/security/
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-055-03.json

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