Python 3.9 End of Life
Support dates, vulnerabilities published since end of life, and upgrade guidance — rebuilt from live data.
Python 3.9 reached end of life on 31 Oct 2025. It no longer receives security fixes.
Support timeline
Official dates from the Python release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 5 Oct 2020 | — |
| End of life | 31 Oct 2025 | 0.8 years ago |
| Active support ended | 17 May 2022 | security fixes only after this |
| Latest release | 3.9.25 · 31 Oct 2025 | final |
The cost of staying: CVEs since end of life
13 Python vulnerabilities have been published since 31 Oct 2025. All were fixed in supported branches — 3.9 received none of them. Source: NVD.
Python CVEs published since 3.9's EOL, by year
0 of the 13 are rated critical · data refreshed 2026-08-09
Published 1 Dec 2025 · rated high — fixed in supported branches only, never in 3.9. Details
Published 16 Mar 2026 · rated high — fixed in supported branches only, never in 3.9. Details
Published 16 Mar 2026 · rated high — fixed in supported branches only, never in 3.9. Details
Where to go from 3.9
Recommended target: Python 3.14 (supported until 31 Oct 2030).
The newest actively supported branch is Python 3.14 (latest release 3.14.7). Review docs.python.org before upgrading.
Frequently asked questions
Is Python 3.9 still safe to use?
No. Python 3.9 stopped receiving security fixes on 31 Oct 2025. Since then, 13 Python vulnerabilities have been published and fixed in supported branches — Python 3.9 received none of those fixes.
Can I still download Python 3.9?
Yes — the final release (3.9.25) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Python 3.9 to?
Upgrade to Python 3.14, the newest actively supported branch (supported until 31 Oct 2030).