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 15/09/2026, that is in 19 days. The current version of Mattermost is 11.10.1. The cycles come from the open endoflife.date project, last reconciled on 26/08/2026.
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 |
|---|---|---|---|
| 11.10 | 11.10.1 | 80 days left | EOL in 80 days |
| 11.9 | 11.9.1 | 49 days left | EOL in 49 days |
| 11.8 | 11.8.5 | 19 days left | EOL in 19 days |
| 11.7 | 11.7.9 | 261 days left | EOL 15 May 27 |
| 11.6 | 11.6.6 | 43 days ago | End of Life |
| 11.5 | 11.5.7 | 73 days ago | End of Life |
| 11.4 | 11.4.5 | 104 days ago | End of Life |
| 11.3 | 11.3.3 | 134 days ago | End of Life |
| 11.2 | 11.2.4 | 165 days ago | End of Life |
| 11.1 | 11.1.3 | 193 days ago | End of Life |
| 11.0 | 11.0.7 | 224 days ago | End of Life |
| 10.12 | 10.12.4 | 255 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 11.611.6.6
- 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
- Mattermost 10.1210.12.4
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 26/08/2026. In case of doubt the vendor's own lifecycle page applies — patchletter deliberately stores no vendor full texts.
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