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CVE-2026-23938— Server DoS via JavaScript preprocessing or script items

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是拉脱维亚Zabbix公司开源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 6.0.46及之前的6.0.x版本、7.0.26及之前的7.0.x版本和7.4.10及之前的7.4.x版本存在异常处理不当漏洞，该漏洞源于创建特制的预处理/脚本项JavaScript脚本，可能导致已认证管理员使Zabbix服务器或代理崩溃，从而造成拒绝服务。

CVSS 2.1 · Low EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 3

VendorProduct Version RangeStatus
Zabbix Zabbix 6.0.0≤ 6.0.46 affected
7.0.0≤ 7.0.26 affected
7.4.0≤ 7.4.10 affected
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I. Basic Information for CVE-2026-23938

Vulnerability Information
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Vulnerability Title
Server DoS via JavaScript preprocessing or script items
Source: CVE Program / CVE List V5
Vulnerability Description
An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Zabbix 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zabbix是拉脱维亚Zabbix公司开源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 6.0.46及之前的6.0.x版本、7.0.26及之前的7.0.x版本和7.4.10及之前的7.4.x版本存在异常处理不当漏洞，该漏洞源于创建特制的预处理/脚本项JavaScript脚本，可能导致已认证管理员使Zabbix服务器或代理崩溃，从而造成拒绝服务。
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 ~ 6.0.46 -

II. Public POCs for CVE-2026-23938

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III. Intelligence Information for CVE-2026-23938

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Vendor Advisories for CVE-2026-23938 (1)

Same Patch Batch · Zabbix · 2026-08-18 · 11 CVEs total

CVE-2026-23929 8.5 HIGH Prototype pollution leading to stored XSS
CVE-2026-23933 7.7 HIGH Hardcoded session key in Zabbix 7.4
CVE-2026-1199 6.9 MEDIUM API and Frontend login lockout race condition
CVE-2026-23935 6.8 MEDIUM Use-after-free read in script item/preprocessing HttpRequest body
CVE-2026-23937 6.0 MEDIUM Host PSK extraction in Zabbix API
CVE-2026-59781 5.4 MEDIUM Improper validation of custom installation directories on Windows could allow installation
CVE-2026-23931 5.3 MEDIUM Frontend plaintext macro value enumeration via the validatate.api.exists action
CVE-2026-23930 5.3 MEDIUM Frontend DoS via the popup.testtriggerexpr action
CVE-2026-23934 5.1 MEDIUM Frontend DoS via the validate.api.exists action
CVE-2026-23922 2.1 LOW Email media OAuth secret leak to Super Admin

IV. Related Vulnerabilities

Same product: Zabbix
Same vendor: Zabbix
Same weakness: CWE-248

V. Comments for CVE-2026-23938

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