Release Notes for Zabbix 4.0.6

Zabbix Team is pleased to announce the availability of Zabbix 4.0.6.

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 4.0.6. 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-5105 Added context menu for trigger name in event details page Frontend
ZBX-15286 Dropped support use of discovered items as master API Frontend
ZBXNEXT-4898 Added support IPv6 for "net.dns" and "net.dns.record" Agent
ZBXNEXT-5037 Added "skip" parameter for vmware.eventlog key Proxy Server
ZBXNEXT-4819 Implemented date and time showing in SVG graph widget Frontend

Bug Fixes

ZBX-15839 Fixed broken layout of the breadcrumbs in Safari browser Frontend
ZBX-15867 Fixed invalid DNS being accepted when receiving discovery contents from Zabbix proxy Server
ZBX-15821 Fixed SQL statement performance used in template.unlink() method API
ZBX-15578 Fixed IPMI errors in case of infrequent reading of values Proxy Server
ZBX-15098 Fixed undefined index in application selection popup window Frontend
ZBX-15351 Fixed PHP error in "Problems by severity" if no problems Frontend
ZBX-15552 Fixed compilation with LibreSSL as OpenSSL replacement and OpenSSL without PSK support Agent Proxy Server
ZBX-10317 Made info column on item list page always visible Frontend
ZBX-15322 Fixed graph area near grid line with 0 value Frontend
ZBX-15798 Fixed proxy configuration update failure on Oracle; fixed failure on empty SQL buffer on Oracle Proxy Server
ZBX-15219 Fixed unwanted removing scenario post fields on scenario update API Frontend
ZBX-11278 Reworked property state indicator in mass update screens Frontend
ZBX-15716 Fixed escalation cancel message is called if escalation interrupts with unfinished step or recovery Server
ZBX-15468 Fixed LDAP configuration form not being able to save changes when user password field is empty string Frontend
ZBX-15669 Fixed page scroll after widget being added to dashboard Frontend
ZBX-15548 Fixed resolving of {ITEM.VALUE} macro in the trigger description Frontend
ZBX-15774 Fixed memory leak in housekeeper when elasticsearch is used Server
ZBX-15788 Fixed crash when substituting LLD macros in calculated item formula expression Server
ZBX-15608 Fixed when Widget Graph show disabled trigger/problem Frontend
ZBX-10397 Fixed when global messaging severities unchecked if profile saved earlier Frontend
ZBX-15596 Fixed when widget in frontend can be created larger than API validation supports API Frontend
ZBX-15308 Fixed timeselector in screens when page is opened with link containing sid argument Frontend
ZBX-15694 Fixed trimming of empty spaces for custom multiplier in item and item prototype preprocessing forms Frontend
ZBX-15196 Fixed "Follow redirects" checkbox not being enabled by default for HTTP agent in item, item prototype and LLD rule create forms Frontend
ZBX-15670 Fixed inefficient vmware eventlog downloading Proxy Server
ZBX-15483 Fixed undefined index in Item Prototype update Frontend
ZBX-15270 Fixed graph widget configuration form cross browser issues Frontend
ZBX-15300 Fixed widgets extra space at the bottom Frontend
ZBX-8091 Added alphabetic ordering of net.dns.record respond Agent
ZBX-15707 Fixed check box design when drag and drop an interface into SNMP Frontend
ZBX-15535 Fixed validation of min/max value range in graph widget; fixed translation string in graph widget Frontend
ZBX-15386 Fixed Trigger overview not showing OK triggers API Frontend
ZBX-14538 Fixed error message when value of lifetime or history/trends storage period is out of range API Frontend
ZBX-15614 Fixed validation of y axis item on classic graph create and update API Frontend
ZBX-15226 Fixed missing visual gap under page title Frontend
ZBX-15560 Fixed incorrect URL argument formatting when parameters are non-indexed arrays Frontend
ZBX-15719 Fixed undefined index in trigger expression popup Frontend
ZBX-15332 Fixed dashboard svg graph update on timeselector interval change Frontend
ZBX-15728 Fixed agent startup problem in Win 2008 R2 w/o SP1, removed dependency on version helper API Agent
ZBX-15622 Fixed trigger expression test dialog not being usable with long trigger expressions Frontend
ZBX-13332 Fixed Request-URI Too Long errors in PopUps; fixed lost focus, when closing error popup Frontend
ZBX-15607 Fixed possibility of zombie processes occurring when signaling agent during metric execution Agent
ZBX-10496 Fixed links to installation instructions in README file Documentation
ZBX-15625 Removed links leading to media type edit form for non-superadmins in Reports->Notifications page Frontend
ZBX-15703 Fixed use of uninitialized variable when receiving 0 bytes on listening socket Proxy Server
ZBX-15537 Fixed visual bug when filter tab was overlapped by sub navigation Frontend
ZBX-15539 Fixed validation of master item in item update form Frontend
ZBX-15532 Fixed undefined index error on problems page when trigger expression contains web items Frontend
ZBX-15488 Fixed permission check for inherited triggers API
ZBX-15646 Fixed web-server 'Request-URI Too Long' error in trigger description dialog Frontend

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 4.0.6.

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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