Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') Affecting zabbix/zabbix package, versions [7.4.0alpha1,7.4.7rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-ZABBIXZABBIX-15798523
- published28 Mar 2026
- disclosed24 Mar 2026
- creditpitticus
Introduced: 24 Mar 2026
CVE-2026-23923 (opens in a new tab)How to fix?
Upgrade zabbix/zabbix to version 7.4.7rc1 or higher.
Overview
Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') via the validate action in the Frontend component. An attacker can instantiate arbitrary PHP classes by sending crafted requests without authentication.