Release Lifecycle

What is a Release Lifecycle?

During each monthly release, Mattermost backports high severity or high impact security fixes to the previous three monthly releases. Extended Support Releases receive backports for security fixes and major bug fixes for the length of their life cycle. Once a release life cycle has ended, it will no longer receive the security or major bug backports. We follow the same release cycle pattern for all upcoming releases.

Important

Upgrade to server version v5.19 or later is required. Support for server Extended Support Release (ESR) 5.9 has ended and upgrading to server ESR v5.19 or later is required for improved security, performance, mobile app compatibility, and user experience. See this blog post for more details.

Version Release Type Lifecyle Start Date Lifecycle End Date Extended Support Release
5.27 Quality 2020-09-16 2020-12-15  
5.26 Feature 2020-08-16 2020-11-15  
5.25 Quality 2020-07-16 2021-04-15 Yes
5.24 Feature 2020-06-16 2020-09-15  
5.23 Quality 2020-05-16 2020-08-15  
5.22 Feature 2020-04-16 2020-07-15  
5.21 Quality 2020-03-16 2020-06-15  
5.20 Feature 2020-02-16 2020-05-15  
5.19 Quality 2020-01-16 2020-09-15 Yes
5.18 Feature 2019-12-16 2020-03-15  
5.17 Quality 2019-11-16 2020-02-15  
5.16 Feature 2019-10-16 2020-01-15  
5.15 Quality 2019-09-16 2019-12-15  
5.14 Feature 2019-08-16 2019-11-15  
5.13 Quality 2019-07-16 2019-09-15  
5.12 Feature 2019-06-16 2019-08-15  
5.11 Quality 2019-05-16 2019-07-15  
5.10 Feature 2019-04-16 2019-06-15  
5.9 Quality 2019-03-16 2020-04-15 Yes
5.8 Feature 2019-02-16 2019-04-15  
5.7 Quality 2019-01-16 2019-03-15  
5.6 Feature 2018-12-16 2019-02-15  
5.5 Quality 2018-11-16 2019-01-15  
5.4 Feature 2018-10-16 2018-12-15  
5.3 Feature 2018-09-16 2018-11-15  
5.2 Feature 2018-08-16 2018-10-15  
5.1 Feature 2018-07-16 2018-09-15  
5.0 Feature 2018-06-16 2018-08-15  
4.10 Feature 2018-05-16 2019-07-15 Yes
4.9 Feature 2018-04-16 2018-06-15  
4.8 Feature 2018-03-16 2018-05-15  
4.7 Feature 2018-02-16 2018-04-15  
4.6 Feature 2018-01-16 2018-03-15  
4.5 Feature 2017-12-16 2018-02-15  
4.4 Feature 2017-11-16 2018-01-15  
4.3 Feature 2017-10-16 2017-12-15  
4.2 Feature 2017-09-16 2017-11-15  
4.1 Feature 2017-08-16 2017-10-15  
4.0 Feature 2017-07-16 2017-09-15