Bug 2545865 (CVE-2026-59782)

Summary: CVE-2026-59782 zabbix: Zabbix: Information disclosure via the JavaScript preprocessing engine
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Zabbix. An authenticated user with limited administrative privileges can read raw server memory by leveraging the JavaScript preprocessing engine. This flaw leads to information disclosure, exposing sensitive data from other concurrently running preprocessor tasks that should not be accessible to that user.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2545902, 2545901, 2545903    
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Description OSIDB Bzimport 2026-10-05 10:44:44 UTC
The JavaScript preprocessing (Duktape) engine on Zabbix server has a vulnerability where a limited administrator is able to read raw heap data potentially resulting in leaked data from other running preprocessors not available to said administrator.