CVE-2026-23929: Zabbix

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Zabbix Zabbix: from 6.0.0, before 6.0.46 (fixed in 6.0.46); from 7.0.0, before 7.0.25 (fixed in 7.0.25); from 7.4.0, before 7.4.9 (fixed in 7.4.9)

Published 2026-08-18. Last modified 2026-09-08.