High severity · published Apr 3, 2026
CVE-2026-28766
Gardyn Cloud API Missing Authentication for Critical Function
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
Cloud API · Gardyn
before 2.12.2026 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28766
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-28766
Third Party Advisory
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-055-03.json
Vendor Advisory
https://mygardyn.com/security/
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-055-03
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