Is Your Ruby Version Still Supported? A Maintainer's Guide to Ruby's Release Cycle

I'm Hiroshi Shibata (hsbt), a Ruby committer and one of the branch maintainers responsible for Ruby's stable releases. I also maintain RubyGems and Bundler. TL;DR Since the March 2026 security releases of Ruby 3.3.11 and 3.2.11, no critical build issues or other problems have been reported. As announced in each release note, I'm now confirming: Ruby 3.2 has reached end-of-life , and Ruby 3.3 has moved to security-only maintenance . If you're on either version, now is the time to plan your upgrade to Ruby 3.4 or 4.0. This post explains how Ruby's release cycle works, who maintains each branch, and what "security maintenance" actually means in practice. What Happened in March On March 26-27, 2026, we released Ruby 3.3.11 and Ruby 3.2.11 — both addressing CVE-2026-27820, a buffer overflow in Zlib::GzipReader . These weren't ordinary patch releases: Ruby 3.2.11 is the final release of the 3.2 series. No further updates of any kind will be provided. Ruby 3.2 had been supported for over thre