---
id: CVE-2026-23929
title: >-
  Prototype pollution vulnerability in searchParamsToObject() is leading to a
  persistent XSS in Maps
summary: >-
  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
  trave…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-1321
vendor: zabbix
product: zabbix
affected:
  - 'zabbix >= 6.0.0, < 6.0.46'
  - 'zabbix >= 7.0.0, < 7.0.25'
  - 'zabbix >= 7.4.0, < 7.4.9'
patched:
  - zabbix 7.4.9
published: '2026-08-18'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T15:10:20.633'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23929'
references:
  - url: 'https://support.zabbix.com/browse/ZBX-28068'
    label: security@zabbix.com
tags:
  - nvd
epss: 0.00185
epssPercentile: 0.08322
ingestedAt: '2026-09-08T15:33:26.953Z'
---

## Overview

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.

## Affected

- `zabbix >= 6.0.0, < 6.0.46`
- `zabbix >= 7.0.0, < 7.0.25`
- `zabbix >= 7.4.0, < 7.4.9`

## Remediation

Upgrade past the affected range:

- `zabbix 7.4.9`