CVE-2026-23920
7.7
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Zabbix | Zabbix | 7.0.0 <= 7.0.21 | affected |
| Zabbix | Zabbix | 7.2.0 <= 7.2.14 | affected |
| Zabbix | Zabbix | 7.4.0 <= 7.4.5 | affected |
Weaknesses
- CWE-78: CWE-78 CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Workarounds
It is possible to use \A and \z anchors in the regex validation as a workaround.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
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