Ruby 3.3.11 has been released. This release includes an update to the zlib gem addressing CVE-2026-27820, along with some bug fixes.

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Ruby 3.3.11 has been released, including a security fix for CVE-2026-27820 (a buffer overflow in the zlib gem) and miscellaneous bug fixes. Notably, this is the final regular maintenance release for the Ruby 3.3 series. Going forward, Ruby 3.3 enters a one-year security-only maintenance phase lasting until end of March 2027, after which official support ends. Users are advised to plan migration to Ruby 3.4 or 4.0.

Ruby 3.3.11 Released