Vulnerability · Published Mar 2, 2026 · Assigned by GitHub_M

CVE-2026-28286ZimaOS: Unauthorized Creation of Files/Folders in Restricted System Directories via API

High 8.6

In plain English

A high-severity security flaw in ZimaOS from IceWhaleTech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)8.6High

Exploit odds (30 days)0.5%top 59.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

Official description

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 creates files or directories in locations where normal users should have no write access. This indicates that the API does not properly validate the target path, allowing unauthorized operations on critical system directories. No known patch is publicly available.

Affected products (as reported)

Vendor	Product	Versions
IceWhaleTech	ZimaOS	= 1.5.2-beta3

Weakness: CWE-73 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-65mg-9gw5-vr7g x_refsource_CONFIRM