Authentication Bypass Vulnerability in Gardyn Products
CVE-2026-28766

9.2CRITICAL

Key Information:

Vendor

Gardyn

Status
Cloud Api
Vendor
CVE Published:
3 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-28766?

A security flaw in Gardyn products allows unauthenticated access to sensitive endpoint information, exposing all user account data for registered users. This vulnerability presents a significant risk, as it enables potential attackers to retrieve personal information without the need for authentication, compromising user privacy and security.

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Deploy the Patch

Affected Version(s)

Cloud API 0 < 2.12.2026

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-28766
Created by MichaelAdamGroberman

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-0...
https://mygardyn.com/security/
https://github.com/cisagov/CSAF/blob/develop/csaf_files/O...

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Michael Groberman reported these vulnerabilities to CISA.
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