Apache Cassandra 4.0 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Apache Cassandra 4.0 is actively supported.
4.0.21 latest release
Support timeline
Official dates from the Apache Cassandra release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 26 Jul 2021 | — |
| End of life (scheduled) | — | not announced |
| Latest release | 4.0.21 · 7 Aug 2026 | current |
Frequently asked questions
When does Apache Cassandra 4.0 reach end of life?
No end-of-life date has been announced for Apache Cassandra 4.0 yet.
Is Apache Cassandra 4.0 still supported?
Yes. Apache Cassandra 4.0 is currently maintained. Latest release: 4.0.21, published 7 Aug 2026.
What happens when Apache Cassandra 4.0 reaches end of life?
Security fixes stop. After — this branch receives no further updates under standard support.
How long do I have to upgrade from Apache Cassandra 4.0?
No end-of-life date has been announced yet.