Bug 2450874 (CVE-2026-23919) - CVE-2026-23919 Zabbix Server: Zabbix Proxy: Duktape: Zabbix Server and Proxy: Information disclosure via reused JavaScript contexts
Summary: CVE-2026-23919 Zabbix Server: Zabbix Proxy: Duktape: Zabbix Server and Proxy:...
Keywords:
Status: NEW
Alias: CVE-2026-23919
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2450932 2450934 2450937 2450941
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-24 19:03 UTC by OSIDB Bzimport
Modified: 2026-03-24 20:21 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-03-24 19:03:06 UTC 
For performance reasons Zabbix Server/Proxy reuses JavaScript (Duktape) contexts (used in script items, JavaScript reprocessing, Webhooks). This can lead to confidentiality loss where a regular (non-super) Zabbix administrator leaks data for hosts they do not have access to. A fix has been released that makes the built in Zabbix JavaScript objects read-only, but please be advised that usage of global JavaScript variables is not recommended because their content could be leaked. More information <a href='https://www.zabbix.com/documentation/7.4/en/manual/installation/known_issues#preprocessing-global-variables-are-unsafe'>in Zabbix documentation</a>.
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