CVE-2026-23920
Fixed in a distro release EPSS <1%CVSS 7.7
Host and event action script input is validated with a regex (set by the administrator), but the validation runs in multiline mode. If ^ and $ anchors are used in user input validation, an injected newline lets authenticated users bypass the check and inject shell commands.
Products: Zabbix
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian:12 | zabbix | no fix |
| Debian:13 | zabbix | 1:7.0.22+dfsg-1~deb13u1 |
| Debian:14 | zabbix | 1:7.0.22+dfsg-1 |
| Ubuntu:25.10 | 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 |