CVE-2026-23920
HIGH EPSS 16.0%
Published Mar 24, 20263mo ago · Modified Jun 17, 20262w ago
7.7 CVSS 4.0
Published Mar 24, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago
Description
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 Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
16.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-78 OS Command Injection Injection
References 1
- support.zabbix.com https://support.zabbix.com/browse/ZBX-27639
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.