Input validation error in Zabbix - CVE-2026-23938
Published: August 18, 2026
Vulnerability identifier: #VU144184
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-23938
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper input validation in JavaScript preprocessing or script items when processing specifically crafted JavaScript scripts. A remote privileged user can create specifically crafted preprocessing or script item JavaScript scripts to cause a denial of service.
The issue can crash the Zabbix server or proxy.
Affected software
Zabbix
How to mitigate CVE-2026-23938
Install security update from vendor's website.
Zabbix - addressed in versions 6.0.47, 7.0.27, 7.4.11