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CVE-2026-23929— Prototype pollution leading to stored XSS

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 6.0.44至6.0.45版本、7.0.22至7.0.24版本和7.4.6至7.4.8版本存在输入验证错误漏洞，该漏洞源于searchParamsToObject()函数存在原型污染漏洞，URL参数处理未过滤__proto__等危险属性，结合jQuery不安全元素创建遍历原型链，可能导致持久性跨站脚本攻击。

CVSS 8.5 · High EPSS 0.30% · P22

Affected Version Matrix 3

VendorProduct Version RangeStatus
Zabbix Zabbix 6.0.44≤ 6.0.45 affected
7.0.22≤ 7.0.24 affected
7.4.6≤ 7.4.8 affected
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I. Basic Information for CVE-2026-23929

Vulnerability Information
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Vulnerability Title
Prototype pollution leading to stored XSS
Source: CVE Program / CVE List V5
Vulnerability Description
Prototype pollution vulnerability in searchParamsToObject() is leading to a persistent XSS in Maps. URL parameter processing was not filtering dangerous properties like __proto__, combined with jQuery's unsafe element creation that traversed the prototype chain.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1321
Source: CVE Program / CVE List V5
Vulnerability Title
Zabbix 输入验证错误漏洞
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 6.0.44至6.0.45版本、7.0.22至7.0.24版本和7.4.6至7.4.8版本存在输入验证错误漏洞，该漏洞源于searchParamsToObject()函数存在原型污染漏洞，URL参数处理未过滤__proto__等危险属性，结合jQuery不安全元素创建遍历原型链，可能导致持久性跨站脚本攻击。
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 6.0.44 ~ 6.0.45 -

II. Public POCs for CVE-2026-23929

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III. Intelligence Information for CVE-2026-23929

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Vendor Advisories for CVE-2026-23929 (1)

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

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-2026-23938 2.1 LOW Server DoS via JavaScript preprocessing or script items
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-1321

V. Comments for CVE-2026-23929

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