critical9.0
CVE-2026-28798
ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI.
Impact
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 products
| Vendor | Product | Affected versions |
|---|---|---|
| Zimaspace | Zimaos | before 1.5.3 |