CVE-2026-23919
Description
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>.
How to fix
- zabbix zabbix6.0.42, 7.0.19, 7.2.13, 7.4.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| zabbix zabbix | 6.0.0 ≤ v < 6.0.42, 7.0.0 ≤ v < 7.0.19, 7.2.0 ≤ v < 7.2.13, 7.4.0 ≤ v < 7.4.3 | 6.0.42, 7.0.19, 7.2.13, 7.4.3 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.