by Kastro
Paper/Archive/CVE-2026-28766

CVE-2026-28766

Gardyn Cloud API — Gardyn Cloud API Missing Authentication for Critical Function

EPSS 0.4%CVSS 9.3
critical.is priorityof 100
36
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 38.6.386 × 207.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

Affected

ProductAffectedFixed inSource
Cloud API< 2.12.20262.12.2026CNA

Scores by source

icscert (CNA)9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
icscert (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refcisa.gov/news-events/ics-advisories/icsa-26-055-03refmygardyn.com/securityrefgithub.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-055-03.json