Python 3.15 End of Life
Support dates, the patch stream you lose at EOL, and upgrade guidance — rebuilt from live data.
Python 3.15 is actively supported. It reaches end of life on 31 Oct 2031.
Support timeline
Official dates, read directly from devguide.python.org, peps.python.org and python.org.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 1 Oct 2026 | this month |
| Security Support ends | 31 Oct 2031 | in 5y 1mo |
| Latest release | — | current |
What you lose on 31 Oct 2031
Being supported means fixes keep shipping to this branch. Here is the stream that stops. Source: NVD.
Python CVEs published and patched, by year
15 published in the last 12 months · data refreshed 2026-10-05
At the last-12-month rate of 15 Python CVEs, running 3.15 for a year past 31 Oct 2031 means roughly that many vulnerabilities fixed upstream but never backported to your branch. Past branches bear this out: Python 3.10 has missed 0 since it went end of life.
How much runway a newer branch buys
Moving to Python 3.16 extends security support by about 366 days.
| Branch | End of life | Days left | vs 3.15 |
|---|---|---|---|
| Python 3.16 | 31 Oct 2032 | 2,218 | +366 days |
| Python 3.15 | 31 Oct 2031 | 1,852 | this branch |
| Python 3.14 | 31 Oct 2030 | 1,487 | -365 days |
| Python 3.13 | 31 Oct 2029 | 1,122 | -730 days |
| Python 3.12 | 31 Oct 2028 | 757 | -1,095 days |
| Python 3.11 | 31 Oct 2027 | 391 | -1,461 days |
Review docs.python.org before moving to Python 3.16.
Frequently asked questions
When does Python 3.15 reach end of life?
Python 3.15 reaches end of life on 31 Oct 2031 — 1,852 days from now. After that date it receives no security fixes.
Is Python 3.15 still supported?
Yes. Python 3.15 is currently maintained. Latest release: —.
What happens when Python 3.15 reaches end of life?
Security fixes stop. Over the last 12 months 15 Python vulnerabilities were published and patched across supported branches; once 3.15 is end of life, fixes at that rate no longer reach it.
How long do I have to upgrade from Python 3.15?
1,852 days. Moving to Python 3.16 instead buys roughly 366 more days of security support.