Release Notes for Zabbix 5.0.28

Zabbix Team is pleased to announce the availability of Zabbix 5.0.28.

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 5.0.28. Download it from download.

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-7868 Backported support of OpenSSL 3.0
ZBXNEXT-6666 Added listen socket security fix for Agent 2 on Windows

Bug Fixes

ZBX-21558 Fixed possible crash in value cache when a new item is being added in low memory situation
ZBX-20943 Fixed long hostgroup names in LLD hostgroup prototypes fails 2nd and consequent runs
ZBX-21519 Added note about php-fpm process name in documentation of PHP-FPM by Zabbix agent template
ZBX-21332 Fixed runtime errors when linking items from two templates that populate same inventory field
ZBX-21070 Fixed missing discovery rule for a discovered host group and updated links to host prototype
ZBX-21304 Fixed ping item preprocessing regex in PHP-FPM templates to be compatible with Zabbix agent 2
ZBX-41474 Fixed shortened tag names with multibyte symbols
ZBX-21454 Added blocking of rtc signals during script execution
ZBX-21449 Fixed accessibility attributes
ZBX-18838 Removed non-existent value 'failed' in script.execute response property

Installation and Upgrade Notes


See Zabbixマニュアル for full details.


See Upgrade procedure for upgrade options and instructions. For version specific upgrade notes, see Upgrade notes for 5.0.28.

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 営業への問い合わせ for pricing and more details.


Zabbix 5.0 Manual