#VU124619 Deserialization of Untrusted Data in Zabbix - CVE-2026-23923

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Main Vulnerability Database Vulnerabilities #VU124619

#VU124619 Deserialization of Untrusted Data in Zabbix - CVE-2026-23923

Published: March 25, 2026


Vulnerability identifier: #VU124619
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-23923
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Zabbix
Software vendor:
Zabbix

Description

The vulnerability allows a remote attacker to instantiate arbitrary PHP classes.

The vulnerability exists due to improper input validation in the Frontend 'validate' action when handling requests. A remote attacker can send a specially crafted request to instantiate arbitrary PHP classes.

The impact depends on the environment setup but appears limited at this time.


Remediation

Install security update from vendor's website.

External links