Apache Pulsar 4.0 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Apache Pulsar 4.0 is actively supported. It reaches end of life on 21 Oct 2026.
5 days of security support left
4.0.14 latest release
99% of this branch's supported lifetime has elapsed — 21 Oct 2024 → 21 Oct 2026.
Support timeline
Official dates from the Apache Pulsar release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 21 Oct 2024 | 2y ago |
| Active Support ends | 21 Oct 2026 | this month |
| Security Support ends | 21 Oct 2027 | in 1y |
| Latest release | 4.0.14 · 5 Oct 2026 | current |
How much runway a newer branch buys
Moving to Apache Pulsar 5.0 extends security support by about 715 days.
| Branch | End of life | Days left | vs 4.0 |
|---|---|---|---|
| Apache Pulsar 5.0 | 5 Oct 2028 | 720 | +715 days |
| Apache Pulsar 4.0 | 21 Oct 2026 | 5 | this branch |
Frequently asked questions
When does Apache Pulsar 4.0 reach end of life?
Apache Pulsar 4.0 reaches end of life on 21 Oct 2026 — 5 days from now. After that date it receives no security fixes.
Is Apache Pulsar 4.0 still supported?
Yes. Apache Pulsar 4.0 is currently maintained. Latest release: 4.0.14, published 5 Oct 2026.
What happens when Apache Pulsar 4.0 reaches end of life?
Security fixes stop. After 21 Oct 2026 this branch receives no further updates under standard support, though extended support runs to 21 Oct 2027.
How long do I have to upgrade from Apache Pulsar 4.0?
5 days. Moving to Apache Pulsar 5.0 instead buys roughly 715 more days of security support.