What’s Vulnerable › Vulnerabilities
CVE-2026-23934: Frontend DoS via the validate.api.exists action
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-18 · updated 2026-09-23
- Weakness: CWE-405
Description
An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.
Affected products
- Zabbix: from 7.4.0 before 7.4.12 — fixed in 7.4.12
How to fix
Upgrade to a fixed version: Zabbix 7.4.12. Check the vendor advisory for mitigations.
References
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