CVE-2026-28767Public exploitNetwork attack vector

Unauthenticated notification data disclosure via admin endpoint

Published Apr 3, 2026 · Updated Apr 3, 2026

Missing authentication in Gardyn Cloud API before 2.12.2026 allows remote attackers to read administrative notification data. The /api/admin/notifications endpoint processes unauthenticated GET requests and returns internal notification-system data and administrative communications. No account or user interaction is required; the documented impact is read-only disclosure, with no confirmed ability to alter notifications.

CVSS severity6.9
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Gardyn Cloud API before 2.12.2026 allows remote attackers to read administrative notification data. The /api/admin/notifications endpoint processes unauthenticated GET requests and returns internal notification-system data and administrative communications. No account or user interaction is required; the documented impact is read-only disclosure, with no confirmed ability to alter notifications.

The record

CVE
CVE-2026-28767
Published
Apr 3, 2026
Updated
Apr 3, 2026
Vendor
Gardyn
Product
Gardyn Cloud API
Classifications
CWE-306, 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=0 <2.12.2026

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gardyn · Gardyn Cloud APIversion=0 <2.12.2026

Published CVSS scores

6.9CISA ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
5.3CISA ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
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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