Ruby 3.3.12 Released

Posted by hsbt on 16 Jul 2026

Ruby 3.3.12 has been released.

This release includes security fixes. Please check the topics below for details.

• CVE-2026-41316: ERB @_init deserialization guard bypass via def_module / def_method / def_class

This release updates the default gem erb to 4.0.3.1 and the bundled gem net-imap to 0.4.25. The net-imap update fixes CVE-2026-42245, CVE-2026-42246, CVE-2026-42256, CVE-2026-42257, CVE-2026-42258, CVE-2026-47240, CVE-2026-47241 and CVE-2026-47242. Please see the release notes of net-imap v0.4.24 and net-imap v0.4.25 for the details of these fixes.

Please see the GitHub releases for further details.

Download

• https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.12.tar.gz

  SIZE: 21489887
  SHA1: 1ecad817a7d3727db65cf898a51d9956888cee5b
  SHA256: b06d63beae271933033e27f0a389bc582a009e7845357d44365c39de525a051b
  SHA512: 7c620438e85beb6744acc7d1e917af554238739883d592aa9839fca78514c11e91dfd8c4b5ce611d1ea507a4412ed81f3a8b5fc6eb07ba3e392a77b518de6829
  

• https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.12.tar.xz

  SIZE: 15891224
  SHA1: 7df70ae8a9feb880e2ad5054dfebd712ba03d0eb
  SHA256: 873e3297990b8cff7a5436f6e510a3a7a18c74e5f2c794e4162e605fe0a743b3
  SHA512: 1755901f5d1e66250e4f9f4e3a0bf31ec25055f1cb86fafc68281f6d108e9cf5329a6c74c221b1a31aa7de78e9c2d8aa7b76faf39acfce44c5ed94cf7e766f3f
  

• https://cache.ruby-lang.org/pub/ruby/3.3/ruby-3.3.12.zip

  SIZE: 26954647
  SHA1: 8be5a3c6f4a8821ce5326a9e09d4230c9fa06faa
  SHA256: fc1aecfb45adeb7bebbf9549d45ce6e57f0c9dac8b83cdeb80680de02a83ce41
  SHA512: ff5a0339310c464b88a444871f901f41fc735f77668b29dfc70389aae5d44fd90b55cff6c02d47a23596663525b526a86f9906c08c371d37e3fb105ea9c6b1a9
  

Many committers, developers, and users who provided bug reports helped us make this release. Thanks for their contributions.