Question 1

What happens when Cos reaches end of life?

Accepted Answer

When Cos reaches end of life, it stops receiving security patches, bug fixes, and new features. Currently, 12 Cos versions are already EOL. The latest supported version is Cos cos-125, maintained until September 1, 2027. Running an EOL version exposes your systems to unpatched security vulnerabilities with no official fix available.

Question 2

Is Cos cos-125 still supported?

Accepted Answer

Yes. Cos cos-125 is actively supported until September 1, 2027. It receives security patches and bug fixes. Check the version table above for the full list of supported Cos releases and their exact end-of-life dates.

Question 3

Is it safe to use Cos after end of life?

Accepted Answer

No. Running Cos after EOL is not safe for production systems. Once a version reaches end of life, newly discovered CVEs are published publicly but never patched — leaving your systems permanently exposed. The only safe path is upgrading to an actively supported Cos release.

Question 4

How to upgrade from Cos cos-113 to Cos cos-125.x?

Accepted Answer

To upgrade Cos from cos-113 to cos-125: (1) review the official migration guide for breaking changes, (2) test your application against the new version in a staging environment, (3) update dependencies that have version constraints, (4) run your full test suite, (5) deploy with a rollback plan. The earlier you start, the more time you have to resolve compatibility issues before EOL.

Question 5

When is the next Cos LTS version?

Accepted Answer

Cos cos-125 is the current Long Term Support release, maintained until September 1, 2027. LTS versions are recommended for production deployments that prioritize long-term stability over new features. Plan your upgrades to coincide with LTS releases whenever possible.

Question 6

How long does Cos support each version?

Accepted Answer

On average, Cos supports each release for approximately 21 months (~1.8 years). LTS releases like Cos cos-125 have extended support windows — maintained until September 1, 2027. The exact EOL date for each version is listed in the table above.

Version	Released	Active support	EOL date	Until EOL	Latest	CVEs	Status
cos-125 LTS	Oct 9, 2025	—	Sep 1, 2027	in 449d	cos-125-19216-395-47	—	Active
cos-121 LTS	Apr 14, 2025	—	Mar 1, 2027	in 265d	cos-121-18867-381-144	—	Active
cos-117 LTS	Oct 2, 2024	—	Sep 1, 2026	in 84d	cos-117-18613-613-25	—	EOL soon
cos-113 LTS	Apr 15, 2024	—	Mar 1, 2026	100d ago	cos-113-18244-582-104	—	EOL
cos-109 LTS	Sep 27, 2023	—	Sep 1, 2025	281d ago	cos-109-17800-570-50	—	EOL
cos-105 LTS	Apr 3, 2023	—	Apr 1, 2025	434d ago	cos-105-17412-535-98	—	EOL
cos-101 LTS	Sep 15, 2022	—	Sep 1, 2024	646d ago	cos-101-17162-528-64	—	EOL
cos-97 LTS	Mar 29, 2022	—	Mar 1, 2024	830d ago	cos-97-16919-450-41	—	EOL
cos-93 LTS	Oct 18, 2021	—	Oct 1, 2023	982d ago	cos-93-16623-461-42	—	EOL
cos-89 LTS	Apr 7, 2021	—	Mar 1, 2023	1196d ago	cos-89-16108-798-22	—	EOL
cos-85 LTS	Sep 24, 2020	—	Sep 1, 2022	1377d ago	cos-85-13310-1498-13	—	EOL
cos-81 LTS	Mar 27, 2020	—	Sep 1, 2021	1742d ago	cos-81-12871-1317-8	—	EOL
cos-77 LTS	Sep 27, 2019	—	Apr 1, 2021	1895d ago	cos-77-12371-1109-0	—	EOL
cos-73 LTS	Mar 25, 2019	—	Jun 1, 2020	2199d ago	cos-73-11647-656-0	—	EOL
cos-69 LTS	Sep 18, 2018	—	Dec 1, 2019	2382d ago	cos-69-10895-385-0	—	EOL

Cos End of Life Dates

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