Mattermost 12.0 End of Life

Support dates and upgrade guidance — rebuilt from live data.

Supported

Mattermost 12.0 is actively supported. It reaches end of life on 15 Jan 2027.

73 days of security support left

12.0.1 latest release

20% of this branch's supported lifetime has elapsed — 16 Oct 2026 → 15 Jan 2027.

Check your versionsudo -u mattermost /opt/mattermost/bin/mattermost version

Support timeline

Official dates from the Mattermost release process.

Mattermost 12.0 is the newest branch — this is the longest runway currently available.

Branch	End of life	Days left	vs 12.0
Mattermost 12.0	15 Jan 2027	73	this branch
Mattermost 11.11	15 Dec 2026	42	-31 days
Mattermost 11.10	15 Nov 2026	12	-61 days
Mattermost 11.7	15 May 2027	193	+120 days

When does Mattermost 12.0 reach end of life?

Mattermost 12.0 reaches end of life on 15 Jan 2027 — 73 days from now. After that date it receives no security fixes.

Is Mattermost 12.0 still supported?

Yes. Mattermost 12.0 is currently maintained. Latest release: 12.0.1, published 22 Oct 2026.

What happens when Mattermost 12.0 reaches end of life?

Security fixes stop. After 15 Jan 2027 this branch receives no further updates under standard support.

How long do I have to upgrade from Mattermost 12.0?

73 days. This is already the newest branch, so this is the longest runway currently available.