CVE-2026-23923

Unauthenticated arbitrary PHP class instantiation

State: Published
Severity: 6.9 Medium
Published: Mar 24, 2026
Updated: Mar 25, 2026
Reserved: Jan 19, 2026

Description

An unauthenticated attacker can exploit the Frontend 'validate' action to blindly instantiate arbitrary PHP classes. The impact depends on environment setup but appears limited at this time.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	Zabbix

Weaknesses

CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Affected Products

Product	Versions
ZabbixZabbix	7.4.0 through 7.4.6Affectedfrom 7.4.7Not affected

References

https://support.zabbix.com/browse/ZBX-27641

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