CVE-2026-28798: critical vulnerability in IceWhaleTech ZimaOS
Arbitrary internal service access via /v1/sys/proxy when Cloudflare Tunnel is enabled on ZimaOS
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.1epss 0.4%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected products
IceWhaleTech · ZimaOSRelated CVEs — IceWhaleTech ZimaOS
In the same product, most dangerous first.
CVE-2024-49357HIGHZimaOS (Installed Applications and System Information) has Unauthorized Sensitive Data LeakEPSS 23.7%CVE-2026-21891CRITICALZimaOS has Authentication Bypass via System-Level UsernameEPSS 2.3%CVE-2024-49359HIGHZimaOS vulnerable to Directory Listing via Parameter ManipulationEPSS 1.0%CVE-2024-48931HIGHZimaOS Arbitrary File Read via Parameter ManipulationEPSS 0.7%CVE-2024-48932MEDIUMZimaOS Unauthenticated API Discloses UsernamesEPSS 0.5%CVE-2024-49358MEDIUMZimaOS vulnerable to Username Enumeration via API ResponsesEPSS 0.5%