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CVE-2026-23919

Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server

Published: Mar 24, 2026Updated: Mar 25, 2026 Sources: CVE List NVD BDUCWE-488
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.2%
Top 95.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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>.

CVSS Vector Breakdown

AV:AAC:LC:HI:LA:L
Exploitability
AV:AAccess Vector
Adjacent Network
AC:LAccess Complexity
Low
Impact
C:HConfidentiality
H
I:LIntegrity
L
A:LAvailability
L
Open in CVSS calculator →

Weaknesses

CWE-488

Affected Products

ZabbixZabbix
On-premDesktop App
Enterprise Software / itsm-monitoring
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
ZabbixZabbix LLC.
On-premWeb App
Enterprise Software / itsm-monitoring
zabbixoss-projectSEEnterprise Software
ооо «ред софт»commercialRUOperating Systemsaka red soft
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
zabbix llc.commercialUSEnterprise Softwareaka zabbix llc, zabbix

Exploitability

Official Patch Available

References

https://support.zabbix.com/browse/ZBX-27638
support.zabbix.com
https://support.zabbix.com/browse/ZBX-27638&#13;
support.zabbix.com
https://redos.red-soft.ru/search/?iblock_id=24&amp;q=CVE-2026-23919&#13;
redos.red-soft.ru
and 2 more references View all →

Timeline

Published
Mar 24, 2026
Last Updated
Mar 25, 2026

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