CVE-2026-59788Hinoki check available

Super Admin XSS via unchecked OAuth URL

Published Oct 5, 2026 · Updated Oct 5, 2026

Stored XSS in Zabbix 7.4.0 through 7.4.11 allows attackers to run JavaScript as a Super Admin via an imported email media type. The email media type OAuth form passes the stored Authorization endpoint to window.open() without rejecting a javascript: scheme, so the browser executes the supplied code. Exploitation requires a Super Admin to import or open a crafted media type and initiate OAuth consent; the code runs in that administrator's browser context.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Zabbix 7.4.0 through 7.4.11 allows attackers to run JavaScript as a Super Admin via an imported email media type. The email media type OAuth form passes the stored Authorization endpoint to window.open() without rejecting a javascript: scheme, so the browser executes the supplied code. Exploitation requires a Super Admin to import or open a crafted media type and initiate OAuth consent; the code runs in that administrator's browser context.

The record

CVE
CVE-2026-59788
Published
Oct 5, 2026
Updated
Oct 5, 2026
Vendor
Zabbix
Product
Zabbix
Classifications
T1204.002
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 5, 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=7.4.0 <=7.4.11 changes=[{"at":"7.4.12","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Zabbix · Zabbixversion=7.4.0 <=7.4.11 changes=[{"at":"7.4.12","status":"unaffected"}]

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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