CVE-2026-28766
Gardyn Cloud API Missing Authentication for Critical Function
CVE-2026-28766 is a critical vulnerability (CVSS 9.2) in Gardyn Cloud Api, published April 3, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.44%, the 39th percentile. No source names a fixed version.
- Severity
- 9.2 CriticalCVSS 4.0, CVE List
- Exploit chance
- 0.44%EPSS, 39th percentile
- Exploitation
- None known1 public exploit
- Fixed in
- No fix listedNo source names one
Description
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- Low
- Availability
- None
Exploit likelihood
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | MichaelAdamGroberman/CVE-2026-28766 | 2026-04-07 |
What each source reports
CVE List Score used
Gardyn Cloud API Missing Authentication for Critical Function
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
- Record
CVE-2026-28766- CVSS 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 - CVSS 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N - Weakness
- CWE-306
- Updated
- 2026-11-02
EUVDEUVD-2026-18839
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
- Record
EUVD-2026-18839- CVSS 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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-m7jc-wgg6-fhj3
A specific endpoint exposes all user account information for registered Gardyn users without...
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
- Record
GHSA-m7jc-wgg6-fhj3- CVSS 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/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 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N - Weakness
- CWE-306
- Updated
- 2026-11-02
NVD
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
- Record
CVE-2026-28766- CVSS 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/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 3.1
- 9.3 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-306
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.