The current version of Container-Optimized OS is cos-133-19999-44-126 (as of 12/10/2026). patchletter checks the official source daily and emails you new releases.
BSI security advisories
Advisories the German BSI (CERT-Bund) published for this product. Whether your version is affected is stated in the advisory itself.
- Linux Kernel: Mehrere Schwachstellen
WID-SEC-W-2026-2730 · 20 Oct
- Linux Kernel: Mehrere Schwachstellen
WID-SEC-W-2026-1454 · 20 Oct
- Linux Kernel: Mehrere Schwachstellen
WID-SEC-W-2026-3211 · 20 Oct
- Linux Kernel: Mehrere Schwachstellen
WID-SEC-W-2026-1279 · 20 Oct
- OpenSSL: Mehrere Schwachstellen
WID-SEC-W-2026-0995 · 19 Oct
- Linux Kernel: Mehrere Schwachstellen
WID-SEC-W-2026-1405 · 19 Oct
- Golang Go: Mehrere Schwachstellen
WID-SEC-W-2026-0345 · 19 Oct
- Linux Kernel: Mehrere Schwachstellen
WID-SEC-W-2026-1088 · 19 Oct
Support cycles (endoflife.date)
| Cycle | Latest version | Status |
|---|---|---|
| cos-133LTS | cos-133-19999-44-126 | EOL 1 Nov 28 |
| cos-129LTS | cos-129-19506-549-7 | EOL 1 Jul 28 |
| cos-125LTS | cos-125-19216-739-5 | EOL 1 Feb 28 |
| cos-121LTS | cos-121-18867-638-5 | EOL 1 Mar 27 |
| cos-117LTS | cos-117-18613-767-2 | End of Life |
| cos-113LTS | cos-113-18244-582-104 | End of Life |
| cos-109LTS | cos-109-17800-570-50 | End of Life |
| cos-105LTS | cos-105-17412-535-98 | End of Life |
Version history & changelog · as detected by patchletter
| Version | Channel | Date | Notes |
|---|---|---|---|
| cos-133-19999-44-126 | LTS | 12/10/2026 | – |
| cos-133-19999-44-106 | LTS | 06/10/2026 | – |
| cos-133-19999-44-85 | LTS | 28/09/2026 | – |
| cos-129-19506-505-8 | LTS | 28/09/2026 | – |
| cos-129-19506-448-36 | LTS | 17/09/2026 | – |
| cos-129-19506-448-20 | LTS | 08/09/2026 | – |
| cos-129-19506-448-8 | LTS | 31/08/2026 | – |
| cos-129-19506-299-161 | LTS | 24/08/2026 | – |
| cos-129-19506-299-148 | LTS | 19/08/2026 | – |
| cos-129-19506-299-137 | LTS | 17/08/2026 | – |
| cos-129-19506-299-116 | LTS | 11/08/2026 | – |
| cos-129-19506-299-82 | LTS | 04/08/2026 | – |
| cos-129-19506-299-60 | LTS | 28/07/2026 | – |
| cos-129-19506-299-36 | LTS | 20/07/2026 | – |
| cos-129-19506-299-20 | LTS | 13/07/2026 | – |
Frequently asked questions
- What is the latest version of Container-Optimized OS?
- Container-Optimized OS cos-133-19999-44-126, released 12/10/2026. patchletter checks the vendor's official source daily for new releases.
- Where can I find the Container-Optimized OS release notes?
- The version history above links to the vendor's official release notes where the vendor publishes them. patchletter deliberately stores no vendor full texts.
- How do I get notified about new Container-Optimized OS updates?
- Tick Container-Optimized OS off in the catalogue and leave your address. From then on new versions go out by email — one at a time, or bundled in the daily or weekly digest.
An email as soon as a new Container-Optimized OS version ships
We reconcile the vendor source daily. When a new version appears, it lands in your inbox right away or bundled as a digest. The update email is free and ends with one click. Alerts about vulnerabilities and end of support are part of patchletter Pro.
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[](https://patchletter.com/en/software/container-optimized-os)https://patchletter.com/badge/container-optimized-os.svgAlso available: ?v=eol (end of support) and ?v=cve (actively exploited).
