CVE-2026-28798: ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. Prior to version 1.5.3, a proxy endpoint (/v1/sys/proxy) exposed…

PriorityP267critical10CVSS 3.1

AVNACLPRNUINSCCHIHAH

EPSS

0.39%

30.5th percentile

ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI. Prior to version 1.5.3, a proxy endpoint (/v1/sys/proxy) exposed by ZimaOS's web interface can be abused (via an externally reachable domain using a Cloudflare Tunnel) to make requests to internal localhost services. This results in unauthenticated access to internal-only endpoints and sensitive local services when the product is reachable from the Internet through a Cloudflare Tunnel. This issue has been patched in version 1.5.3.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
icewhaletech	zimaos	< 1.5.3	1.5.3
zimaspace	zimaos	< 1.5.3	1.5.3

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