Vulnerability · Published Apr 3, 2026 · Assigned by icscert
CVE-2026-28766Gardyn Cloud API Missing Authentication for Critical Function
Critical 9.3
In plain English
A critical-severity missing authentication in Cloud API from Gardyn. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)9.3Critical
Exploit odds (30 days)0.4%top 61.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC
Official description
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
Affected products (as reported)
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N