Gardyn Cloud API Missing Authentication for Critical Function
Summary
| CVE | CVE-2026-28766 |
|---|---|
| State | PUBLISHED |
| Assigner | icscert |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-03 21:17:10 UTC |
| Updated | 2026-04-03 21:17:10 UTC |
| Description | A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication. |
Risk And Classification
Primary CVSS: v4.0 9.2 CRITICAL from [email protected]
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/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
Problem Types: CWE-306 | CWE-306 CWE-306
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 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/E:X/C... |
| 4.0 | CNA | CVSS | 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 |
| 3.1 | [email protected] | Secondary | 9.3 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
| 3.1 | CNA | CVSS | 9.3 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N |
CVSS v4.0 Breakdown
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/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
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-05... | [email protected] | github.com | |
| mygardyn.com/security | [email protected] | mygardyn.com | |
| www.cisa.gov/news-events/ics-advisories/icsa-26-055-03 | [email protected] | www.cisa.gov | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Michael Groberman reported these vulnerabilities to CISA. (en)
Additional Advisory Data
Solutions
CNA: Gardyn states that the relevant fixes are included in the latest version of the Gardyn mobile application. Users are required to run a supported version of the Gardyn App on their phone in order to access Gardyn services and devices. The current versions of the Gardyn App and the Gardyn Home firmware can be checked in the Gardyn App. For all vulnerabilities, Gardyn recommends users ensure their home kit and studio devices are upgraded to firmware master.622 or later. Gardyn also recommends that users update their mobile application to the most recent version. Gardyn requests that users ensure their devices have network connectivity in order to automatically download needed firmware updates. Unconnected devices will automatically update when configured with a working Internet connection.