Silverstripe CMS 5.4 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Silverstripe CMS 5.4 is actively supported. It reaches end of life on 30 Apr 2027.
264 days of security support left
5.4.0 latest release
65% of this branch's supported lifetime has elapsed — 10 Apr 2025 → 30 Apr 2027.
Check your versioncomposer info silverstripe/cms
Support timeline
Official dates from the Silverstripe CMS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 10 Apr 2025 | — |
| End of life (scheduled) | 30 Apr 2027 | in 264 days |
| Active support ended | 11 Apr 2026 | security fixes only after this |
| Latest release | 5.4.0 · 10 Apr 2025 | current |
How much runway a newer branch buys
Silverstripe CMS 5.4 is the newest branch — this is the longest runway currently available.
| Branch | End of life | Days left | vs 5.4 |
|---|---|---|---|
| Silverstripe CMS 6.2 | 30 Apr 2027 | 264 | 0 days |
| Silverstripe CMS 6.1 | 18 Oct 2026 | 70 | -194 days |
| Silverstripe CMS 5.4 | 30 Apr 2027 | 264 | this branch |
Frequently asked questions
When does Silverstripe CMS 5.4 reach end of life?
Silverstripe CMS 5.4 reaches end of life on 30 Apr 2027 — 264 days from now. After that date it receives no security fixes.
Is Silverstripe CMS 5.4 still supported?
Yes. Silverstripe CMS 5.4 is currently maintained. Latest release: 5.4.0, published 10 Apr 2025.
What happens when Silverstripe CMS 5.4 reaches end of life?
Security fixes stop. After 30 Apr 2027 this branch receives no further updates under standard support.
How long do I have to upgrade from Silverstripe CMS 5.4?
264 days. This is already the newest branch, so this is the longest runway currently available.