Release Notes for Zabbix 4.0.33

Zabbix Team is pleased to announce the availability of Zabbix 4.0.33.

Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is released under the GPL, thus it is free of charge for both commercial and non-commercial use. A complete text of the license is available at

This document contains the release notes for Zabbix 4.0.33. Download it from download.

The following sections describe the release in details and provide late-breaking or other information that supplements its main documentation.

Bug Fixes

ZBX-16822 Fixed performance issues for installations with a lot of historical alerts
ZBX-19439 Fixed Action log dashboard widget missing Remote command entries
ZBX-19703 Added fix for json path preprocessing crash
ZBX-19670 Resolving config file symlink in CConfigFile.php
ZBX-19589 Fixed trailing and leading white-space not getting trimmed in widget configuration form inputs
ZBX-19342 Fixed web scenario items not being cloned for graph prototypes
ZBX-19134 Fixed not supported icmpping item when server catches a signal
ZBX-19505 Fixed automatic log rotation accessing deleted log files for longer than required

Installation and Upgrade Notes


See Zabbix Manual for full details.


Recompile Zabbix binaries and update front-end PHP files. Execute a database patch if migrating from Zabbix 1.8.x. See Zabbix manual for a detailed upgrade procedure.

Commercial support

Zabbix Company provides a full range of Professional Services. We also provide trouble-free Upgrade Service for easy migration from earlier versions of Zabbix. Please Contact sales for pricing and more details.


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