CVE-2026-28798Public exploitNetwork attack vector

Internal service access via unrestricted proxy destinations

Published Apr 3, 2026 · Updated Apr 3, 2026

SSRF in ZimaOS before 1.5.3 allows remote attackers to reach internal services through the web interface's /v1/sys/proxy endpoint. The endpoint accepts an attacker-controlled destination and forwards requests without blocking localhost or internal-only addresses. Exploitation requires Internet exposure through a Cloudflare Tunnel and grants unauthenticated access to sensitive local endpoints, including administrative APIs.

CVSS severity9.0
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in ZimaOS before 1.5.3 allows remote attackers to reach internal services through the web interface's /v1/sys/proxy endpoint. The endpoint accepts an attacker-controlled destination and forwards requests without blocking localhost or internal-only addresses. Exploitation requires Internet exposure through a Cloudflare Tunnel and grants unauthenticated access to sensitive local endpoints, including administrative APIs.

The record

CVE
CVE-2026-28798
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
IceWhale Technology Limited
Product
ZimaOS
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 3, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IceWhale Technology Limited · ZimaOSversion=< 1.5.3

Published CVSS scores

9.0GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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