CVE-2026-28798
Arbitrary internal service access via /v1/sys/proxy when Cloudflare Tunnel is enabled on ZimaOS
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.
INFO
Published Date :
April 3, 2026, 8:16 p.m.
Last Modified :
July 24, 2026, 10:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update ZimaOS to version 1.5.3.
- Ensure Cloudflare Tunnel is securely configured.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-28798.
| URL | Resource |
|---|---|
| https://github.com/IceWhaleTech/ZimaOS/releases/tag/1.5.3 | Product Release Notes |
| https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-vqqj-f979-8c8m | Exploit Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-28798 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-28798
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-28798 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-28798 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: ZimaOS de IceWhaleTech, Description: ZimaOS es un fork de CasaOS, un sistema operativo para dispositivos Zima y sistemas x86-64 con UEFI. Antes de la versión 1.5.3, un endpoint de proxy (/v1/sys/proxy) expuesto por la interfaz web de ZimaOS puede ser explotado (a través de un dominio accesible externamente usando un Túnel de Cloudflare) para realizar solicitudes a servicios internos de localhost. Esto resulta en acceso no autenticado a endpoints solo internos y servicios locales sensibles cuando el producto es accesible desde Internet a través de un Túnel de Cloudflare. Este problema ha sido parcheado en la versión 1.5.3. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'IceWhaleTech', 'product': 'ZimaOS', 'versions': [{'status': 'affected', 'version': '< 1.5.3'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-28798', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-04-06T15:40:06.830577Z'} -
Initial Analysis by [email protected]
Apr. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:o:zimaspace:zimaos:*:*:*:*:*:*:*:* versions up to (excluding) 1.5.3 Added Reference Type GitHub, Inc.: https://github.com/IceWhaleTech/ZimaOS/releases/tag/1.5.3 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-vqqj-f979-8c8m Types: Exploit, Vendor Advisory -
New CVE Received by [email protected]
Apr. 03, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-918 Added Reference https://github.com/IceWhaleTech/ZimaOS/releases/tag/1.5.3 Added Reference https://github.com/IceWhaleTech/ZimaOS/security/advisories/GHSA-vqqj-f979-8c8m