Checkmk end-of-life: support & EOL dates for every release
Checkmk · Monitoring · 3 supported · 1 end-of-life · updated June 2026 · what is end-of-life? →
This is when each Checkmk release line stops receiving security updates. 3 release lines are still supported — the next to reach end-of-life is Checkmk 2.3 on 29 Oct 2026. Running an end-of-life version means new vulnerabilities stay unpatched.
Checkmk support timeline
Each release line and the date it reaches end-of-life — newest first.
| Release | Latest version | End-of-life | Status |
|---|---|---|---|
| Checkmk 2.5 | 2.5 | 28 Apr 2028 · in 22 mo | Supported |
| Checkmk 2.4 | 2.4 | 6 Nov 2027 · in 17 mo | Supported |
| Checkmk 2.3 | 2.3 | 29 Oct 2026 · in 4 mo | Ends soon |
| Checkmk 2.2 | 2.2 | 23 Nov 2025 | End of life |
Which Checkmk version should I run?
The safest choice is the latest supported release, 2.5. If you're on an end-of-life line, plan an upgrade to a supported one before security updates stop. See Checkmk's full security status →
Get warned before Checkmk reaches end-of-life
End-of-life dates are easy to miss until it's too late. Monitor Checkmk on IsItPatched and we'll email you before the release line you run stops getting security updates — free, no account needed to start.
Checkmk end-of-life — frequently asked
What Checkmk versions are still supported?
As of June 2026, these Checkmk release lines still receive security updates: 2.5, 2.4, 2.3. The latest supported release is 2.5. Versions older than these (2.2) are end-of-life and no longer patched.
When does Checkmk 2.3 reach end of life?
Checkmk 2.3 reaches end-of-life on 29 Oct 2026 — about 4 months away. After that date it stops receiving security patches.
Is Checkmk end-of-life?
No — Checkmk still has supported release lines (2.5, 2.4, 2.3). But individual older versions are end-of-life, so what matters is the specific version you run.
How do I know when my Checkmk version reaches end of life?
Check the version you run on its product page, or monitor Checkmk on IsItPatched to get an email alert before the release line you use reaches end-of-life — so you can upgrade in time.
EOL dates aggregated from endoflife.date and vendor sources, and can change — always confirm with Checkmk. See related: Checkmk security status · full EOL calendar · what is end-of-life software? · disclaimer.