Silverstripe CMS 6.1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Silverstripe CMS 6.1 is actively supported. It reaches end of life on 18 Oct 2026.
70 days of security support left
6.1.0 latest release
81% of this branch's supported lifetime has elapsed — 13 Oct 2025 → 18 Oct 2026.
Check your versioncomposer info silverstripe/cms
Support timeline
Official dates from the Silverstripe CMS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 13 Oct 2025 | — |
| End of life (scheduled) | 18 Oct 2026 | in 70 days |
| Active support ended | 17 Apr 2026 | security fixes only after this |
| Latest release | 6.1.0 · 13 Oct 2025 | current |
How much runway a newer branch buys
Moving to Silverstripe CMS 6.2 extends security support by about 194 days.
| Branch | End of life | Days left | vs 6.1 |
|---|---|---|---|
| Silverstripe CMS 6.2 | 30 Apr 2027 | 264 | +194 days |
| Silverstripe CMS 6.1 | 18 Oct 2026 | 70 | this branch |
| Silverstripe CMS 5.4 | 30 Apr 2027 | 264 | +194 days |
Frequently asked questions
When does Silverstripe CMS 6.1 reach end of life?
Silverstripe CMS 6.1 reaches end of life on 18 Oct 2026 — 70 days from now. After that date it receives no security fixes.
Is Silverstripe CMS 6.1 still supported?
Yes. Silverstripe CMS 6.1 is currently maintained. Latest release: 6.1.0, published 13 Oct 2025.
What happens when Silverstripe CMS 6.1 reaches end of life?
Security fixes stop. After 18 Oct 2026 this branch receives no further updates under standard support.
How long do I have to upgrade from Silverstripe CMS 6.1?
70 days. Moving to Silverstripe CMS 6.2 instead buys roughly 194 more days of security support.