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

CVE-2026-28766

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

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

CRITICAL · CVSS 9.3 EPSS 0.00086
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-306Missing Authentication for Critical Function
▤

Affected Products & Versions

1
mygardyn cloud api< 2.12.2026
▣

Scoring & Timeline

9.3
CRITICAL · CVSS v3.1 · ics-cert@hq.dhs.gov
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Apr 2026 · 09:17 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

1
cisa-csafcisa-csaf-csaf_files-OT-white-2026-icsa-26-055-03
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-055-03.jsonThird Party Advisory
https://mygardyn.com/security/Vendor Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-055-03Third Party AdvisoryUS Government Resource
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