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

Quick assessment

Affected
Zabbix Zabbix
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zabbix是Zabbix公司的一套开源的监控系统。该系统支持网络监控、服务器监控、云监控和应用监控等。 Zabbix存在安全漏洞，该漏洞源于JavaScript环境重用不当，可能导致非超级管理员泄露其无权访问的主机数据。

AI Predicted 7.8 Difficulty: Easy EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2026-23919

Vulnerability Information
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Vulnerability Title
Insufficient isolation of JavaScript (Duktape) execution context on Zabbix Server
Source: CVE Program / CVE List V5
Vulnerability 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>.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对错误会话暴露数据元素
Source: CVE Program / CVE List V5
Vulnerability Title
Zabbix 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zabbix是Zabbix公司的一套开源的监控系统。该系统支持网络监控、服务器监控、云监控和应用监控等。 Zabbix存在安全漏洞，该漏洞源于JavaScript环境重用不当，可能导致非超级管理员泄露其无权访问的主机数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zabbix Zabbix 6.0.0 ~ 6.0.41 -

II. Public POCs for CVE-2026-23919

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III. Intelligence Information for CVE-2026-23919

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Vendor Pages for CVE-2026-23919 (1)

Same Patch Batch · Zabbix · 2026-03-24 · 5 CVEs total

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CVE-2026-23920 Host and event action script regex validation can be bypassed in certain situations, leadi
CVE-2026-23923 Unauthenticated arbitrary PHP class instantiation
CVE-2026-23921 Blind, read-only SQL injection in Zabbix API via sortfield parameter

IV. Related Vulnerabilities

Same product: Zabbix
Same vendor: Zabbix
Same weakness: CWE-488

V. Comments for CVE-2026-23919

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