# CVE-2026-23919

## Summary

- **CVE ID:** CVE-2026-23919
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L)
- **CWE:** CWE-488
- **Published:** Mar 24, 2026
- **Last Modified:** Apr 22, 2026

## 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>.

## Affected Products

- Zabbix — Zabbix (6.0.0)
- Zabbix — Zabbix (7.0.0)
- Zabbix — Zabbix (7.2.0)
- Zabbix — Zabbix (7.4.0)

## References

- [CNA](https://support.zabbix.com/browse/ZBX-27638)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.15%
- **EPSS Percentile:** 4.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._