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VulnerabilityPublished Updated

CVE-2026-28798: IceWhaleTech ZimaOS · Server-Side Request Forgery (SSRF)

Affects IceWhaleTech ZimaOSSource CVE Database V5

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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

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.

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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
IceWhaleTechZimaOSAffected
  • <1.5.3
Fixed in
  • 1.5.3
GitHubicewhaletech/ZimaOSpkg:github/icewhaletech/ZimaOSOther threatsAffected
  • <1.5.3
Fixed in
  • 1.5.3

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.

References

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