Mattermost end of life: end of support by version
Mattermost Inc. · Collaboration & Communication
For Mattermost by Mattermost Inc., patchletter knows 12 support cycles. 8 of them have already ended and receive no more security updates. The next support window closes on 15/10/2026, that is in 4 days. The current version of Mattermost is 11.11.1. The cycles come from the open endoflife.date project, last reconciled on 30/09/2026.
When does support end for which Mattermost version?
A cycle is a maintained version line. Where a date is given, support ends on that day — after it the vendor ships no more security updates for that line.
| Cycle | Latest version | End of support | Status |
|---|---|---|---|
| 11.11 | 11.11.1 | 65 days left | EOL in 65 days |
| 11.10 | 11.10.2 | 35 days left | EOL in 35 days |
| 11.9 | 11.9.2 | 4 days left | EOL in 4 days |
| 11.8 | 11.8.5 | 26 days ago | End of Life |
| 11.7 | 11.7.12 | 216 days left | EOL 15 May 27 |
| 11.6 | 11.6.6 | 88 days ago | End of Life |
| 11.5 | 11.5.7 | 118 days ago | End of Life |
| 11.4 | 11.4.5 | 149 days ago | End of Life |
| 11.3 | 11.3.3 | 179 days ago | End of Life |
| 11.2 | 11.2.4 | 210 days ago | End of Life |
| 11.1 | 11.1.3 | 238 days ago | End of Life |
| 11.0 | 11.0.7 | 269 days ago | End of Life |
Which Mattermost versions no longer receive security updates?
8 of 12 cycles have ended. If you run one of those lines, the vendor ships you no more patches — not even for critical flaws.
- Mattermost 11.811.8.5
- Mattermost 11.611.6.6
- Mattermost 11.511.5.7
- Mattermost 11.411.4.5
- Mattermost 11.311.3.3
- Mattermost 11.211.2.4
- Mattermost 11.111.1.3
- Mattermost 11.011.0.7
Where does the EOL data for Mattermost come from?
From the open endoflife.date project, which collects vendors' official support commitments. patchletter reconciles the cycles daily; the Mattermost data is as of 30/09/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
New Mattermost versions by email
Tick the product and patchletter reports new releases by email. The update email costs nothing, and one click stops it again. The warning 90, 30 and 7 days before support ends is part of patchletter Pro.