Python 3.5 End of Life
Support dates, vulnerabilities published since end of life, and upgrade guidance — rebuilt from live data.
Python 3.5 reached end of life on 30 Sept 2020. It no longer receives security fixes.
Support timeline
Official dates from the Python release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 13 Sept 2015 | — |
| End of life | 30 Sept 2020 | 5.9 years ago |
| Latest release | 3.5.10 · 5 Sept 2020 | final |
The cost of staying: CVEs since end of life
50 Python vulnerabilities have been published since 30 Sept 2020. All were fixed in supported branches — 3.5 received none of them. Source: NVD.
Python CVEs published since 3.5's EOL, by year
5 of the 50 are rated critical · data refreshed 2026-08-09
Published 22 Oct 2020 · rated critical — fixed in supported branches only, never in 3.5. Details
Published 19 Jan 2021 · rated critical — fixed in supported branches only, never in 3.5. Details
Published 6 May 2021 · rated critical — fixed in supported branches only, never in 3.5. Details
Where to go from 3.5
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 3.5 still safe to use?
No. Python 3.5 stopped receiving security fixes on 30 Sept 2020. Since then, 50 Python vulnerabilities have been published and fixed in supported branches — Python 3.5 received none of those fixes.
Can I still download Python 3.5?
Yes — the final release (3.5.10) 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 3.5 to?
Upgrade to Python 3.14, the newest actively supported branch (supported until 31 Oct 2030).