Release Notes for Zabbix 4.0.18rc1

Zabbix Team is pleased to announce the availability of Zabbix 4.0.18rc1.

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 4.0.18rc1. Download here.

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

New Features and Improvements

Added database character set check Frontend Proxy Server
ZBXNEXT-5690 Added support for libssh Proxy Server
ZBXNEXT-5706 Replaced xml2-config to pkg-config when building with libxml2 Installation

Bug Fixes

ZBX-17213 Fixed Zabbix proxy not to execute remote commands on Zabbix agent with timeout and not to wait for execution result Proxy
ZBX-17201 Fixed snmp trapper processes exceeding 1000% Server
ZBX-17220 Fixed several PHP 7.4 compatibility issues API Frontend
ZBX-16827 Fixed applications being unlinked from items when both items and applications are not discovered anymore Server
ZBX-17035 Internal events are not created if there is no enabled internal actions Server
ZBX-16965 Fixed link/unlink template operation execution order Server

Installation and Upgrade Notes


See Zabbix documentation for full details.


See Upgrade procedure for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 4.0.18.

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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