CVE-2026-28286: ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI

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HIGH 8.5MITIGATE

CVE-2026-28286 is a high-severity flaw (CVSS 8.5) affecting zimaos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In version 1.5.2-beta3, the application enforces restrictions in the frontend/UI to prevent users from creating files or folders in internal OS paths. However, when interacting directly with the API, the restrictions are bypass-able. By sending a crafted request targeting paths like /etc, /usr, or other sensitive system directories, the API successfully

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-73
Published	2026-03-02
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: zimaspace

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-02 17:16 UTCPublished CVE record published
2026-06-17 10:28 UTCUpdated Record last modified

zimaspace zimaos MITIGATE

Affected: 1.5.2 beta3

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2026-28286?

zimaos: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-28286 being exploited?

CVE-2026-28286 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-2026-28286 affect?

CVE-2026-28286 affects zimaos. Severity is high (CVSS 8.5). ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. In version 1.5.2-beta3, the application enforces restrictions in the frontend/UI to prevent users from creating files or folders in internal OS p

How urgent is CVE-2026-28286?

Priority 44/100. High severity; Public exploit reference

Related CVEs

CVE-2026-28798 CRITICAL 9.0 UPGRADE ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI
CVE-2026-28442 HIGH 8.5 MITIGATE ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI
CVE-2025-64427 HIGH 7.1 UPGRADE ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI

References

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