Umbraco CMS 13 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Supported
Umbraco CMS 13 is actively supported. It reaches end of life on 14 Dec 2026.
70 days of security support left
13.16.2 latest release
94% of this branch's supported lifetime has elapsed — 14 Dec 2023 → 14 Dec 2026.
Support timeline
Official dates from the Umbraco CMS release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 14 Dec 2023 | 2y 10mo ago |
| Support ended | 14 Dec 2025 | security fixes only after this |
| Security ends | 14 Dec 2026 | in 2mo |
| Latest release | 13.16.2 · 14 Sept 2026 | current |
How much runway a newer branch buys
Moving to Umbraco CMS 18 extends security support by about 193 days.
| Branch | End of life | Days left | vs 13 |
|---|---|---|---|
| Umbraco CMS 18 | 25 Jun 2027 | 263 | +193 days |
| Umbraco CMS 17 | 27 Nov 2028 | 784 | +714 days |
| Umbraco CMS 13 | 14 Dec 2026 | 70 | this branch |
Frequently asked questions
When does Umbraco CMS 13 reach end of life?
Umbraco CMS 13 reaches end of life on 14 Dec 2026 — 70 days from now. After that date it receives no security fixes.
Is Umbraco CMS 13 still supported?
Yes. Umbraco CMS 13 is currently maintained. Latest release: 13.16.2, published 14 Sept 2026.
What happens when Umbraco CMS 13 reaches end of life?
Security fixes stop. After 14 Dec 2026 this branch receives no further updates under standard support.
How long do I have to upgrade from Umbraco CMS 13?
70 days. Moving to Umbraco CMS 18 instead buys roughly 193 more days of security support.