ClickHouse 26.3 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
ClickHouse 26.3 is actively supported. It reaches end of life on 26 Mar 2027.
229 days of security support left
26.3.17.110 latest release
37% of this branch's supported lifetime has elapsed — 26 Mar 2026 → 26 Mar 2027.
Check your versionclickhouse-client --version
Support timeline
Official dates from the ClickHouse release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 26 Mar 2026 | — |
| End of life (scheduled) | 26 Mar 2027 | in 229 days |
| Latest release | 26.3.17.110 · 5 Aug 2026 | current |
How much runway a newer branch buys
ClickHouse 26.3 is the newest branch — this is the longest runway currently available.
| Branch | End of life | Days left | vs 26.3 |
|---|---|---|---|
| ClickHouse 26.3 | 26 Mar 2027 | 229 | this branch |
| ClickHouse 25.8 | 29 Aug 2026 | 20 | -209 days |
Frequently asked questions
When does ClickHouse 26.3 reach end of life?
ClickHouse 26.3 reaches end of life on 26 Mar 2027 — 229 days from now. After that date it receives no security fixes.
Is ClickHouse 26.3 still supported?
Yes. ClickHouse 26.3 is currently maintained. Latest release: 26.3.17.110, published 5 Aug 2026.
What happens when ClickHouse 26.3 reaches end of life?
Security fixes stop. After 26 Mar 2027 this branch receives no further updates under standard support.
How long do I have to upgrade from ClickHouse 26.3?
229 days. This is already the newest branch, so this is the longest runway currently available.