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. If ^ and $ anchors are used in user input validation, an injected newline lets authenticated users bypass the check and inject shell commands.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://support.zabbix.com/browse/ZBX-27639	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:zabbix:zabbix::::::::
	cpe:2.3:a:zabbix:zabbix::::::::
	cpe:2.3:a:zabbix:zabbix::::::::

History

No history.

Information

Published : 2026-03-24 19:16

Updated : 2026-09-10 21:15

NVD link : CVE-2026-23920

Mitre link : CVE-2026-23920

CVE.ORG link : CVE-2026-23920

JSON object : View

Products Affected

zabbix

zabbix

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

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