CVE-2026-59788
Received Received - Intake

OAuth Authorization Endpoint JavaScript Execution in Zabbix

Publication date: 2026-10-05

Last updated on: 2026-10-05

Assigner: Zabbix

Description
The email media type OAuth form passes the Authorization endpoint value to window.open() without validating the URL scheme, so a javascript: URL is executed in the browser. This means a crafted media type configuration, deliverable as an import file, runs arbitrary JavaScript as the Super Admin who grants consent.

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Meta Information

Published
2026-10-05
Last Modified
2026-10-05
Generated
2026-10-05
AI Q&A
2026-10-05
EPSS Evaluated
N/A
NVD
CVE-2026-59788
EUVD
EUVD-2026-92400

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Zabbix Zabbix 7.4.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This vulnerability involves the OAuth form in the email media type passing an Authorization endpoint URL to window.open() without checking the URL scheme. This allows a javascript: URL to execute arbitrary JavaScript code in the browser. An attacker could craft a malicious media type configuration, delivered via an import file, to run code as the Super Admin during consent granting.

Detection Guidance

Check Zabbix server configurations for OAuth media type settings that allow javascript: URLs. Inspect browser console logs for unexpected script execution during OAuth consent flows.

Impact Analysis

If exploited, this vulnerability allows an attacker to run arbitrary JavaScript code with Super Admin privileges. This could lead to unauthorized access, data theft, or system compromise. Users importing malicious media type configurations are at risk of falling victim to this attack.

Compliance Impact

This vulnerability allows arbitrary JavaScript execution in the context of a Super Admin who grants consent, which could lead to unauthorized data access, modification, or exfiltration. This poses significant risks to compliance with GDPR (data protection) and HIPAA (health data privacy) by potentially violating confidentiality, integrity, and access control requirements.

Mitigation Strategies

Disable or restrict OAuth media type configurations that accept javascript: URLs. Update Zabbix to the latest patched version if available. Monitor Super Admin accounts for unauthorized consent grants.

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