CVE-2026-28766 Gardyn Cloud API Missing Authentication for Critical Function
Unauthenticated attackers can access all registered user account information via a specific Gardyn Cloud API endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-28766?
CVE-2026-28766 is a critical missing authorization vulnerability in Gardyn Cloud API, published on 3 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.
Weakness: CWE-306
Which versions are affected by CVE-2026-28766?
It affects 1 product.
Products include Mygardyn Cloud Api.
How do I fix CVE-2026-28766?
No fix has been published for CVE-2026-28766 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-28766 being exploited?
There is no known exploitation of CVE-2026-28766 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Gardyn Cloud API
Sources
Also known as GHSA-m7jc-wgg6-fhj3.