high8.8
CVE-2026-23920
Host and event action script input is validated with a regex (set by the administrator), but the validation runs in multiline mode.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Zabbix | Zabbix | from 7.0.0 before 7.0.22 from 7.2.0 before 7.2.15 from 7.4.0 before 7.4.6 |