Splunk 10.4 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Splunk 10.4 is actively supported. It reaches end of life on 18 May 2028.
648 days of security support left
10.4.0 latest release
11% of this branch's supported lifetime has elapsed — 18 May 2026 → 18 May 2028.
Check your versionsplunk --version
Support timeline
Official dates from the Splunk release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 18 May 2026 | — |
| End of life (scheduled) | 18 May 2028 | in 648 days |
| Latest release | 10.4.0 · 18 May 2026 | current |
How much runway a newer branch buys
Splunk 10.4 is the newest branch — this is the longest runway currently available.
| Branch | End of life | Days left | vs 10.4 |
|---|---|---|---|
| Splunk 10.4 | 18 May 2028 | 648 | this branch |
| Splunk 10.2 | 15 Jan 2028 | 524 | -124 days |
| Splunk 10.0 | 28 Jul 2027 | 353 | -295 days |
| Splunk 9.4 | 16 Dec 2026 | 129 | -519 days |
Frequently asked questions
When does Splunk 10.4 reach end of life?
Splunk 10.4 reaches end of life on 18 May 2028 — 648 days from now. After that date it receives no security fixes.
Is Splunk 10.4 still supported?
Yes. Splunk 10.4 is currently maintained. Latest release: 10.4.0, published 18 May 2026.
What happens when Splunk 10.4 reaches end of life?
Security fixes stop. After 18 May 2028 this branch receives no further updates under standard support.
How long do I have to upgrade from Splunk 10.4?
648 days. This is already the newest branch, so this is the longest runway currently available.