CVE-2026-59786: Zabbix

Medium severity, CVSS 6.9. EPSS: 0.2% chance of exploitation in the next 30 days.

Zabbix Server and Proxy accept the active agent heartbeat message regardless of the configured PSK or certificate authentication. This means someone with access to the Zabbix trapper port can report an arbitrary host using an active agent as available, resulting in a loss of integrity.

Affected products

• Zabbix Zabbix

Published 2026-10-05. Last modified 2026-10-06.