CFEngine 3.21 End of Life
Support dates and upgrade guidance — rebuilt from live data.
End of Life
CFEngine 3.21 reached end of life on 31 Dec 2025. It no longer receives security fixes.
221 days without security patches
Recommended action: upgrade to CFEngine 3.28. Check your versioncf-agent --version
Support timeline
Official dates from the CFEngine release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 21 Dec 2022 | — |
| End of life | 31 Dec 2025 | 0.6 years ago |
| Latest release | 3.21.8 · 15 Dec 2025 | final |
Where to go from 3.21
Recommended target: CFEngine 3.28.
The newest actively supported branch is CFEngine 3.28 (latest release 3.28.0).
Frequently asked questions
Is CFEngine 3.21 still safe to use?
CFEngine 3.21 reached end of life on 31 Dec 2025, 221 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download CFEngine 3.21?
Yes — the final release (3.21.8) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade CFEngine 3.21 to?
Upgrade to CFEngine 3.28, the newest actively supported branch.