Container-Optimized OS cos-129 · Version Status
Container-Optimized OS cos-129 End of Life Date
Container-Optimized OS cos-129 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
✓
Container-Optimized OS cos-129 is actively supported. EOL date: July 1, 2028.
📅 Get reminded before Container-Optimized OS cos-129 reaches EOL on July 1, 2028 — alerts 90, 30 & 7 days out.
✓ Alerts are on — confirmation is in your inbox.
EOL Date
Jul 1, 2028
618 days remaining
Latest Release
cos-129-19506-549-22
LTS release
Release Date
May 21, 2026
Container-Optimized OS cos-129 series
Where these dates come from
End of lifeJul 1, 2028endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees ReleaseMay 21, 2026endoflife.date (open dataset) · endoflife.datemedium · 1 source agrees Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
Container-Optimized OS cos-129 was released on May 21, 2026 and support is scheduled to end on July 1, 2028 — a planned supported lifespan of 2 years and 1 month, in line with the 1 year and 11 months median for Container-Optimized OS LTS releases. It is a long-term support (LTS) release, so it carries a longer patch window than the interim releases around it. Its most recent patch is cos-129-19506-549-22, published October 19, 2026.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
All Container-Optimized OS Versions
| Version | Latest | EOL Date | Status |
|---|
| cos-69 LTS |
cos-69-10895-385-0 |
Dec 1, 2019 |
EOL |
| cos-73 LTS |
cos-73-11647-656-0 |
Jun 1, 2020 |
EOL |
| cos-77 LTS |
cos-77-12371-1109-0 |
Apr 1, 2021 |
EOL |
| cos-81 LTS |
cos-81-12871-1317-8 |
Jan 10, 2022 |
EOL |
| cos-85 LTS |
cos-85-13310-1498-13 |
Sep 1, 2022 |
EOL |
| cos-89 LTS |
cos-89-16108-798-22 |
Mar 1, 2023 |
EOL |
| cos-93 LTS |
cos-93-16623-461-42 |
Oct 1, 2023 |
EOL |
| cos-97 LTS |
cos-97-16919-450-41 |
Apr 1, 2024 |
EOL |
What does Container-Optimized OS cos-129 end of life mean?
When Container-Optimized OS cos-129 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: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Container-Optimized OS cos-129 past its EOL date creates a growing attack surface that a clean scan result does not rule out.
Migrate to Container-Optimized OS cos-133 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Container-Optimized OS cos-129 reach end of life?
Container-Optimized OS cos-129 reaches end of life on July 1, 2028. That is 618 days remaining.
Is Container-Optimized OS cos-129 still supported?
Yes, Container-Optimized OS cos-129 is currently supported. The EOL date is July 1, 2028.
What should I upgrade to from Container-Optimized OS cos-129?
The recommended upgrade from Container-Optimized OS cos-129 is
Container-Optimized OS cos-133 — the latest actively supported version. Check the
Container-Optimized OS full timeline for all supported versions.
What are the security risks of running Container-Optimized OS cos-129 past EOL?
When Container-Optimized OS cos-129 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Container-Optimized OS should migrate immediately or implement compensating controls.