What’s Vulnerable › Vulnerabilities
CVE-2026-23923: Unauthenticated arbitrary PHP class instantiation
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-24 · updated 2026-09-10
- Weakness: CWE-470
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.
Affected products
- Zabbix: from 7.4.0 before 7.4.7 — fixed in 7.4.7
How to fix
Upgrade to a fixed version: Zabbix 7.4.7. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-23923 or the next vulnerability affects your stack