Bug 2517813 (CVE-2026-23930)

Summary: CVE-2026-23930 zabbix: Zabbix: Denial of Service via Frontend popup.testtriggerexpr action
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 unauthenticated user can exploit this vulnerability by sending specially crafted requests to the Frontend's `popup.testtriggerexpr` action. This can lead to a denial of service (DoS) by causing a disproportionate load on the Frontend webserver, making the service unavailable to legitimate users.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2545265    
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Description OSIDB Bzimport 2026-08-18 12:37:03 UTC
An unauthenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend popup.testtriggerexpr action, leading to potential denial of service.