CVE-2026-28798: IceWhaleTech ZimaOS · Server-Side Request Forgery (SSRF)
Affects IceWhaleTech ZimaOSSource CVE Database V5
Not known to be exploited · CVSS 9.1 Critical : upgrade to 1.5.3 as a priority.
Data as of 30 Oct 2026, 06:59 UTC
Contested
Critical score, yet low EPSS after six months- EPSS
- 0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.5.3
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 3 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Upgrade ZimaOS and icewhaletech/ZimaOS to 1.5.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| IceWhaleTechZimaOS | Affected
| Fixed in
|
GitHubicewhaletech/ZimaOSpkg:github/icewhaletech/ZimaOSOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch addressing this vulnerability is available in ZimaOS version 1.5.3. Since ZimaOS is a cloud-hosted service, the vendor manages remediation server-side. Users should ensure their ZimaOS instances are updated to version 1.5.3 or later. Check the vendor advisory for confirmation and further guidance.
Description
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.