CVE-2026-28766: A specific endpoint exposes all user account information for registered Gardyn users without requiring authent

Q: How do I fix CVE-2026-28766?

cloud api: upgrade to 2.12.2026. Exact commands for each OS are on this page.

Q: Is CVE-2026-28766 being exploited?

CVE-2026-28766 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-28766 affect?

CVE-2026-28766 affects cloud api. Severity is critical (CVSS 9.3). A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.

Q: How urgent is CVE-2026-28766?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.3REMOTEUPGRADE

CVE-2026-28766 is a critical-severity flaw (CVSS 9.3) affecting cloud api. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.3 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-04-03
Last modified	2026-07-24

Publisher (CNA): ICS-CERT · Vendor: mygardyn

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-03 21:17 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

mygardyn cloud api UPGRADE

Affected: < 2.12.2026

Fixed in: 2.12.2026

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cloud-api || rpm -q cloud-api || cloud-api --version

2. UPGRADE to 2.12.2026 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cloud-api

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cloud-api

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28766?

cloud api: upgrade to 2.12.2026. Exact commands for each OS are on this page.

Is CVE-2026-28766 being exploited?

CVE-2026-28766 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28766 affect?

CVE-2026-28766 affects cloud api. Severity is critical (CVSS 9.3). A specific endpoint exposes all user account information for registered Gardyn users without requiring authentication.

How urgent is CVE-2026-28766?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-25197 CRITICAL 9.1 UPGRADE A specific endpoint allows authenticated users to pivot to other user profiles by modifying the id number in t
CVE-2026-32646 HIGH 7.5 UPGRADE A specific administrative endpoint is accessible without proper authentication, exposing device management fun
CVE-2026-28767 MEDIUM 5.3 UPGRADE A specific administrative endpoint notifications is accessible without proper authentication.
CVE-2026-32662 MEDIUM 5.3 UPGRADE Development and test API endpoints are present that mirror production functionality.

References

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