{"id":"CVE-2026-28798","title":"ZimaOS is a fork of CasaOS, an operating system for Zima devices and x86-64 systems with UEFI","summary":"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 u…","severity":"critical","cvss":9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-918"],"vendor":"zimaspace","product":"zimaos","affected":["zimaos < 1.5.3"],"patched":["zimaos 1.5.3"],"published":"2026-04-03","updated":"2026-07-24","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-28798","references":[{"url":"https://github.com/IceWhaleTech/ZimaOS/releases/tag/1.5.3","label":"security-advisories@github.com"},{"url":"https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-vqqj-f979-8c8m","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00387,"epssPercentile":0.32554,"ingestedAt":"2026-07-25T22:05:04.529Z","slug":"CVE-2026-28798","body":"## Overview\n\nZimaOS 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.\n\n## Affected\n\n- `zimaos < 1.5.3`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `zimaos 1.5.3`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":49.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}