Knative 1.21 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Knative 1.21 reached end of life on 4 Aug 2026. It no longer receives security fixes.
Support timeline
Official dates from the Knative release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 27 Jan 2026 | — |
| End of life | 4 Aug 2026 | 0.0 years ago |
| Latest release | 1.21.3 · 2 Jun 2026 | final |
Where to go from 1.21
Recommended target: Knative 1.23 (supported until 2 Feb 2027).
The newest actively supported branch is Knative 1.23 (latest release 1.23.0).
Frequently asked questions
Is Knative 1.21 still safe to use?
Knative 1.21 reached end of life on 4 Aug 2026, 5 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Knative 1.21?
Yes — the final release (1.21.3) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Knative 1.21 to?
Upgrade to Knative 1.23, the newest actively supported branch (supported until 2 Feb 2027).