Google Container-Optimized OS (COS) cos-109 End of Life
Support dates and upgrade guidance — rebuilt from live data.
Google Container-Optimized OS (COS) cos-109 reached end of life on 1 Sept 2025. It no longer receives security fixes.
Support timeline
Official dates from the Google Container-Optimized OS (COS) release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 27 Sept 2023 | 3y ago |
| Support Status ended | 1 Sept 2025 | 1y 1mo ago |
| Latest release | cos-109-17800-570-50 · 24 Sept 2025 | final |
Where to go from cos-109
Recommended target: Google Container-Optimized OS (COS) cos-133 (supported until 1 Nov 2028).
The newest actively supported branch is Google Container-Optimized OS (COS) cos-133 (latest release cos-133-19999-44-85).
Frequently asked questions
Is Google Container-Optimized OS (COS) cos-109 still safe to use?
Google Container-Optimized OS (COS) cos-109 reached end of life on 1 Sept 2025, 399 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download Google Container-Optimized OS (COS) cos-109?
Yes — the final release (cos-109-17800-570-50) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade Google Container-Optimized OS (COS) cos-109 to?
Upgrade to Google Container-Optimized OS (COS) cos-133, the newest actively supported branch (supported until 1 Nov 2028).