Elasticsearch 9.1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
Elasticsearch 9.1 reached end of life on 3 Feb 2026. It no longer receives security fixes.
187 days without security patches
Recommended action: upgrade to Elasticsearch 9.4. Check your version$ES_HOME/bin/elasticsearch -v
Support timeline
Official dates from the Elasticsearch release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 29 Jul 2025 | — |
| End of life | 3 Feb 2026 | 0.5 years ago |
| Latest release | 9.1.10 · 13 Jan 2026 | final |
Where to go from 9.1
Recommended target: Elasticsearch 9.4.
The newest actively supported branch is Elasticsearch 9.4 (latest release 9.4.4).
Frequently asked questions
Is Elasticsearch 9.1 still safe to use?
Elasticsearch 9.1 reached end of life on 3 Feb 2026, 187 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Elasticsearch 9.1?
Yes — the final release (9.1.10) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Elasticsearch 9.1 to?
Upgrade to Elasticsearch 9.4, the newest actively supported branch.