CVE-2026-59786
Fixed in a distro release EPSS <1%CVSS 6.9
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.
Products: Zabbix
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | zabbix | no fix |
| Debian 13 | zabbix | no fix |
| Debian 14 | zabbix | 1:7.0.29+dfsg-1 |
| Ubuntu 26.04 LTS | zabbix | no fix |
| Ubuntu 26.10 | zabbix | no fix |
| Ubuntu Pro 14.04 LTS | zabbix | no fix |
| Ubuntu Pro 16.04 LTS | zabbix | no fix |
| Ubuntu Pro 18.04 LTS | zabbix | no fix |
| Ubuntu Pro 20.04 LTS | zabbix | no fix |
| Ubuntu Pro 22.04 LTS | zabbix | no fix |