Checkmk 2.5 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Checkmk 2.5 is actively supported. It reaches end of life on 28 Apr 2028.
628 days of security support left
2.5 latest release
14% of this branch's supported lifetime has elapsed — 28 Apr 2026 → 28 Apr 2028.
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Support timeline
Official dates from the Checkmk release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 28 Apr 2026 | — |
| End of life (scheduled) | 28 Apr 2028 | in 628 days |
| Latest release | 2.5 · 28 Apr 2026 | current |
How much runway a newer branch buys
Checkmk 2.5 is the newest branch — this is the longest runway currently available.
| Branch | End of life | Days left | vs 2.5 |
|---|---|---|---|
| Checkmk 2.5 | 28 Apr 2028 | 628 | this branch |
| Checkmk 2.4 | 6 Nov 2027 | 454 | -174 days |
| Checkmk 2.3 | 29 Oct 2026 | 81 | -547 days |
Frequently asked questions
When does Checkmk 2.5 reach end of life?
Checkmk 2.5 reaches end of life on 28 Apr 2028 — 628 days from now. After that date it receives no security fixes.
Is Checkmk 2.5 still supported?
Yes. Checkmk 2.5 is currently maintained. Latest release: 2.5, published 28 Apr 2026.
What happens when Checkmk 2.5 reaches end of life?
Security fixes stop. After 28 Apr 2028 this branch receives no further updates under standard support.
How long do I have to upgrade from Checkmk 2.5?
628 days. This is already the newest branch, so this is the longest runway currently available.