Mattermost 11.9 end of life
26วัน
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About this moment
There are 27 days until Mattermost 11.9 end of life, on Thursday, 15 October 2026.
Mattermost 11.9 reaches end of life on October 15, 2026: upstream support ends and no further security fixes are expected. It was released on July 16, 2026.
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Last verified Sep 18, 2026
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