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CVE-2026-28766

Mygardyn Cloud API authentication bypass

9.3 CRITICALEPSS 0.60%
  1. Published3 Apr 2026

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

Affected products

Mygardyn Cloud API< 2.12.2026

Remediation

Fixed in
Mygardyn Cloud API≥ 2.12.2026
Patch & vendor advisories

References

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Frequently asked

Is CVE-2026-28766 being actively exploited?

CVE-2026-28766 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.60%.

How severe is CVE-2026-28766?

CVE-2026-28766 has a CVSS 3.1 base score of 9.3, rated critical. EPSS estimates a 0.60% probability of exploitation.

Which products are affected by CVE-2026-28766?

Affected products include Mygardyn Cloud API.

How do I fix CVE-2026-28766?

Upgrade affected software to a fixed version, for example Mygardyn Cloud API 2.12.2026 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28766 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.