Vulnerability CVE-2026-23919: Information
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>.
Severity: HIGH (7.1)
Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| zabbix | sisyphus | 7.0.25-alt1 | 7.0.25-alt1 | ALT-PU-2026-5812-1 | 414453 | Fixed |
| zabbix | sisyphus_riscv64 | 7.0.25-alt1 | 7.0.25-alt1 | ALT-PU-2026-5986-1 | - | Fixed |
| zabbix | sisyphus_loongarch64 | 7.0.25-alt1 | 7.0.25-alt1 | ALT-PU-2026-5918-1 | - | Fixed |
| zabbix | p11 | 7.0.25-alt0.p11.1 | 7.0.25-alt0.p11.1 | ALT-PU-2026-5930-2 | 414527 | Fixed |
| zabbix | p10 | 7.0.25-alt0.p10.1 | 7.0.25-alt0.p10.1 | ALT-PU-2026-6079-2 | 414532 | Fixed |
| zabbix | c10f2 | 7.0.25-alt0.c10f2.1 | 7.0.25-alt0.c10f2.1 | ALT-PU-2026-5950-2 | 414561 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://support.zabbix.com/browse/ZBX-27638 |