Apache ZooKeeper end of life dates
Apache ZooKeeper 3.9 is the newest release line, at 3.9.6 (14 Sept 2026). 2 lines are still supported upstream: 3.9 and 3.8. 4 lines have reached end of life, most recently 3.7 on 2 Feb 2024. OSSeva ships patched builds for end-of-life Apache ZooKeeper 3.7, 3.6, 3.5 and 3.4.
- Latest release
- 3.9.6
- Supported lines
- 2
- End-of-life lines
- 4
- Next end of life
- None scheduled
Apache ZooKeeper release timeline
All Apache ZooKeeper versions and end-of-life dates
| Version | Released | Active Support | Security Support | Latest | OSSeva |
|---|---|---|---|---|---|
| 3.9 | 3 years and 2 months ago(19 Jul 2023) | Yes | Yes | 3.9.6 | – |
| 3.8 | 4 years and 7 months ago(25 Feb 2022) | Yes | Yes | 3.8.7 | – |
| 3.7 | 5 years and 6 months ago(17 Mar 2021) | Ended 3 years and 2 months ago(19 Jul 2023) | Ended 2 years and 8 months ago(2 Feb 2024) | 3.7.2 | Patched |
| 3.6 | 6 years and 7 months ago(25 Feb 2020) | Ended 4 years and 7 months ago(7 Mar 2022) | Ended 3 years and 9 months ago(30 Dec 2022) | 3.6.4 | Patched |
| 3.5 | 7 years and 5 months ago(3 May 2019) | Ended 5 years and 6 months ago(27 Mar 2021) | Ended 4 years and 4 months ago(1 Jun 2022) | 3.5.10 | Patched |
| 3.4 | 14 years and 10 months ago(23 Nov 2011) | Ended 6 years and 6 months ago(27 Mar 2020) | Ended 6 years and 4 months ago(1 Jun 2020) | 3.4.14 | Patched |
Lifecycle data from endoflife.date (MIT licence), refreshed 30 Sept 2026. Upstream policy: zookeeper.apache.org. “Patched” marks end-of-life lines OSSeva ships signed, backported builds for.
Running an end-of-life Apache ZooKeeper version?
OSSeva keeps end-of-life Apache ZooKeeper patched with signed builds and backported CVE fixes, documents it for your auditor, and can run it for you, so the upgrade happens on your schedule rather than the project’s.
Apache ZooKeeper extended supportApache ZooKeeper end of life: common questions
What is the latest Apache ZooKeeper version?
3.9.6, released 14 Sept 2026, on the 3.9 line. Other supported lines: 3.8.
Which Apache ZooKeeper versions are still supported?
3.9 and 3.8. Every other line has reached end of life, per the dates in the table above.
Can I get security patches for an end-of-life Apache ZooKeeper version?
Yes. OSSeva ships signed builds with backported CVE fixes for Apache ZooKeeper 3.7, 3.6, 3.5 and 3.4 after upstream support ends, on the Patch, Assure and Operate tiers, so you can stay on the version you run while you plan the upgrade.
Still running an end-of-life Apache ZooKeeper?
Tell us the versions and the estate size. We will tell you whether to upgrade or keep it patched, and what each costs.