ClickHouse 26.8 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
ClickHouse 26.8 is actively supported. It reaches end of life on 27 Aug 2027.
326 days of security support left
26.8.17.4 latest release
11% of this branch's supported lifetime has elapsed — 27 Aug 2026 → 27 Aug 2027.
Check your versionclickhouse-client --version
Support timeline
Official dates from the ClickHouse release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 27 Aug 2026 | 1mo ago |
| Support ends | 27 Aug 2027 | in 11mo |
| Latest release | 26.8.17.4 · 4 Oct 2026 | current |
How much runway a newer branch buys
ClickHouse 26.8 is the newest branch — this is the longest runway currently available.
| Branch | End of life | Days left | vs 26.8 |
|---|---|---|---|
| ClickHouse 26.8 | 27 Aug 2027 | 326 | this branch |
| ClickHouse 26.3 | 26 Mar 2027 | 172 | -154 days |
Frequently asked questions
When does ClickHouse 26.8 reach end of life?
ClickHouse 26.8 reaches end of life on 27 Aug 2027 — 326 days from now. After that date it receives no security fixes.
Is ClickHouse 26.8 still supported?
Yes. ClickHouse 26.8 is currently maintained. Latest release: 26.8.17.4, published 4 Oct 2026.
What happens when ClickHouse 26.8 reaches end of life?
Security fixes stop. After 27 Aug 2027 this branch receives no further updates under standard support.
How long do I have to upgrade from ClickHouse 26.8?
326 days. This is already the newest branch, so this is the longest runway currently available.
All ClickHouse versions
26.9 supported 26.8 supported 26.7 supported 26.6 EOL 2026 26.5 EOL 2026 26.4 EOL 2026 26.3 supported 26.2 EOL 2026 26.1 EOL 2026 25.12 EOL 2026 25.11 EOL 2026 25.10 EOL 2026 25.9 EOL 2025 25.8 EOL 2026 25.7 EOL 2025 25.6 EOL 2025 25.5 EOL 2025 25.4 EOL 2025 25.3 EOL 2026 25.2 EOL 2025 25.1 EOL 2025