Question 1

What happens when Oniguruma reaches end of life?

Accepted Answer

When Oniguruma reaches end of life, it stops receiving security patches, bug fixes, and new features. Currently, 2 Oniguruma versions are already EOL.  Running an EOL version exposes your systems to unpatched security vulnerabilities with no official fix available.

Question 2

Is Oniguruma still supported?

Accepted Answer

Check the version table above for the support status of each Oniguruma release.

Question 3

Is it safe to use Oniguruma after end of life?

Accepted Answer

No. Running Oniguruma 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 Oniguruma release.

Question 4

How to upgrade from Oniguruma 6 to Oniguruma the latest version?

Accepted Answer

To upgrade Oniguruma to the latest version: (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 Oniguruma LTS version?

Accepted Answer

Not all Oniguruma releases have a designated LTS status. Check the version table above — LTS releases are marked with an "LTS" badge. Refer to the official Oniguruma release policy for information on upcoming long-term support versions.

Question 6

How long does Oniguruma support each version?

Accepted Answer

On average, Oniguruma supports each release for approximately 113 months (~9.4 years).  The exact EOL date for each version is listed in the table above.

Version	Released	Active support	EOL date	Until EOL	Latest	CVEs	Status
6	May 9, 2016	—	Apr 24, 2025	411d ago	6.9.10	—	EOL
5	Oct 19, 2006	—	May 9, 2016	3683d ago	5.9.6	—	EOL

Oniguruma End of Life Dates

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