Input validation error in Zabbix - CVE-2026-59783
Published: October 5, 2026
Vulnerability identifier: #VU153279
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59783
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 handling of null byte input in Zabbix Server and Proxy binary items when processing malicious data sent through trapper access. A remote user can send malicious binary-item data containing null bytes to cause a denial of service.
Only deployments using MySQL or MariaDB as the Zabbix database are affected.
Affected software
Zabbix
Fedora
zabbix7.0
Fedora
zabbix7.0
How to mitigate CVE-2026-59783
Install security update from vendor's website.
Zabbix - addressed in versions 7.0.29, 7.4.13
zabbix7.0 - addressed in versions 7.0.31-1.el8, 7.0.31-1.el9, 7.0.31-1.el10_2, 7.0.31-1.el10_3, 7.0.31-1.el10_4
zabbix7.0 - addressed in versions 7.0.31-1.el8, 7.0.31-1.el9, 7.0.31-1.el10_2, 7.0.31-1.el10_3, 7.0.31-1.el10_4