CVE-2026-23919

What it is

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>.

At a glance

Exploitability

Can be exploited from the same network segment with an admin-level account. High risk of data exposure.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-03-24 19:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-18 17:07 UTC Last updatedMost recent change to the record

Details

Published

2026-03-24 19:16 UTC

Last modified

2026-09-18 17:07 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-488

Record status

Analyzed

Affected

• Zabbix < 6.0.42
• Zabbix < 7.0.19
• Zabbix < 7.2.13
• Zabbix < 7.4.3

Attack profile CVSS 4.0 · 7.1

Attack vector

Adjacent network

Complexity

Low

Attack requirements

Present

Privileges needed

High

User interaction

None

Confidentiality

High

Integrity

Low

Availability

Low