Umbraco CMS 11 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Umbraco CMS 11 reached end of life on 1 Dec 2023. It no longer receives security fixes.
Support timeline
Official dates from the Umbraco CMS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 1 Dec 2022 | — |
| End of life | 1 Dec 2023 | 2.7 years ago |
| Active support ended | 1 Sept 2023 | security fixes only after this |
| Latest release | 11.5.0 · 5 Sept 2023 | final |
Where to go from 11
Recommended target: Umbraco CMS 18 (supported until 25 Jun 2027).
The newest actively supported branch is Umbraco CMS 18 (latest release 18.1.0).
Frequently asked questions
Is Umbraco CMS 11 still safe to use?
Umbraco CMS 11 reached end of life on 1 Dec 2023, 982 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Umbraco CMS 11?
Yes — the final release (11.5.0) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Umbraco CMS 11 to?
Upgrade to Umbraco CMS 18, the newest actively supported branch (supported until 25 Jun 2027).