CVE-2026-23919: Zabbix

Medium severity, CVSS 6.0. EPSS: 0.2% chance of exploitation in the next 30 days.

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>.

Affected products

• Zabbix Zabbix: from 6.0.0, before 6.0.42 (fixed in 6.0.42); from 7.0.0, before 7.0.19 (fixed in 7.0.19); from 7.2.0, before 7.2.13 (fixed in 7.2.13); from 7.4.0, before 7.4.3 (fixed in 7.4.3)

Published 2026-03-24. Last modified 2026-09-18.