Python 3.3 · Version Status
Python 3.3 End of Life Date
Python 3.3 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
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Python 3.3 is past end of life. This version no longer receives security patches. 3144 days past EOL — migrate to a supported version immediately.
EOL Date
Sep 29, 2017
3144 days past EOL
Latest Release
3.3.7
Standard release
Release Date
Sep 29, 2012
Python 3.3 series
HeroDevs
Extended Python 3.3 Support
Extended security support for Python beyond PSF EOL dates.
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| Version | Latest | EOL Date | Status |
|---|
| 2.6 |
2.6.9 |
Oct 29, 2013 |
EOL |
| 3.0 |
3.0.1 |
Jun 27, 2009 |
EOL |
| 3.1 |
3.1.5 |
Apr 9, 2012 |
EOL |
| 2.7 |
2.7.18 |
Jan 1, 2020 |
EOL |
| 3.2 |
3.2.6 |
Feb 20, 2016 |
EOL |
| → 3.3 |
3.3.7 |
Sep 29, 2017 |
EOL |
| 3.4 |
3.4.10 |
Mar 18, 2019 |
EOL |
| 3.5 |
3.5.10 |
Sep 30, 2020 |
EOL |
What does Python 3.3 end of life mean?
When Python 3.3 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Python 3.3 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Python 3.14 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Python 3.3 reach end of life?
Python 3.3 reached end of life on September 29, 2017. This version is no longer receiving security patches.
Is Python 3.3 still supported?
No. Python 3.3 reached end of life on September 29, 2017 and is no longer receiving security patches.
What should I upgrade to from Python 3.3?
The recommended upgrade from Python 3.3 is
Python 3.14 — the latest actively supported version. Check the
Python full timeline for all supported versions.
What are the security risks of running Python 3.3 past EOL?
When Python 3.3 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Python should migrate immediately or implement compensating controls.