Release Notes for Zabbix 4.0.16

Zabbix Team is pleased to announce the availability of Zabbix 4.0.16.

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 4.0.16. 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

ZBXNEXT-5271 Implemented 'delete missing' option for imported template linkages API Frontend

Bug Fixes

ZBX-17101 Fixed url validation before output Frontend
ZBX-16929 Fixed history data processing responding with "success", when received only invalid data from proxy/agent/sender Proxy Server
ZBX-16804 Added missing get parameters in availability report Frontend
ZBX-16286 Fixed graph widget dimensions errors on high DPI screens Frontend
ZBX-16848 Fixed fatal error occurring in user profile and user edit forms when PHP FileInfo extension does not exist Frontend
ZBX-16684 Fixed incorrect double quotes in history plain text view Frontend
ZBX-16903 Fixed validation of "interfaceid" field for HTTP agent items with large IDs API
ZBX-16751 Fixed support for php 7.4 Frontend
ZBX-16879 Changed condition description message for tag value in actions and event correlations Frontend
ZBX-9084 Fixed high memory usage during startup Proxy Server
ZBX-16932 Fixed build fail on netBSD Agent
ZBX-16111 Removed templateid from screen API output API Frontend
ZBX-16919 Fixed server check warning width in chrome Frontend
ZBX-16944 Fixed "Type of information" field in item form being marked as required when it is read-only Frontend
ZBX-16912 Fixed image map elements having a hand cursor when there is no context menu available Frontend
ZBX-15041 Fixed request not being cancelled along with popup window in widgets Frontend
ZBX-1977 Fixed axis labels calculation Frontend
ZBX-17034 Updated Zabbix website links Frontend
ZBX-16874 Fixed map-type widget clipping in Internet Explorer Frontend
ZBX-16915 Fixed memory leak Proxy Server
ZBX-17008 Improved Zabbix server performance when using maintenance Server
ZBX-16779 Fixed infinite loop when writing export to file fails Server
ZBX-16540 Splitted host_resources templates into 3 subtemplates: for CPU, memory and storage Templates

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 4.0.16.

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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