High 7.1Published Mar 24, 2026

CVE-2026-23919Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server

Updated under an hour ago (Oct 26, 2026, 1:40 AM ET)

Does this affect you?

It affects Zabbix. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Zabbix

Exploited in the last 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>.

CVSS: 7.1 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-488
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Zabbix
NVD analysis: Analyzed
Record last updated: Apr 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Zabbix Zabbix zabbix:zabbix (from the name)	from 6.0.0 through 6.0.41; fixed at 6.0.42; from 7.0.0 through 7.0.18; fixed at 7.0.19; from 7.2.0 through 7.2.12; fixed at 7.2.13; from 7.4.0 through 7.4.2; fixed at 7.4.3	CNA record
zabbix zabbix zabbix:zabbix	from 6.0.0 before 6.0.42; from 7.0.0 before 7.0.19; from 7.2.0 before 7.2.13; from 7.4.0 before 7.4.3	NVD

References

https://support.zabbix.com/browse/ZBX-27638vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.