205 Rails 4.2 LTS Changelog

Updated . Posted . Visible to the public.

May 14th 2024, Rails version

May 14th 2024, Rack version

Feb 23rd 2024, Rack version

Feb 23rd 2024, Rails version

  • Fixed a regression for CVE-2013-0269, CVE-2020-10663 introducing a vulnerability for JSON.parse on Ruby version 2.7+, see here Show archive.org snapshot for more details. Thanks to Severin Schoepke for bringing this to our attention.

Aug 23rd 2023, Rails version

  • Fixed a bug for Ruby 3.1, where it was not possible to use scopes or class methods on scopes with keyword arguments.

Jun 27th 2023, Rails version

May 22th 2023, Rails versions

  • Fixed a potential (non-security) issue with the / release with certain Ruby versions / version of the uri gem.

Apr 4th 2023, Rails versions

  • Fixed a potential (non-security) issue with the release for certain webserver configurations

Apr 4th 2023, Rails version

  • Added monkey patches to address ReDoS vulnerabilities in the time and uri stdlibs (CVE-2023-28755, CVE-2023-28756), see here Show archive.org snapshot for more details

Mar 27th 2023, Rack version

  • The earlier fix for CVE-2022-44571 was incomplete. This release corrects the issue.

Mar 14th 2023: Rails version

  • Fixed XSS issue with SafeBuffer#bytesplice (CVE-2023-28120, only on Ruby 3.2, which is not currently supported), see here Show archive.org snapshot for more details.

Mar 14th 2023: Rack version

Mar 3rd, 2023: Rails version

  • We've added the Rack::TempfileReaper middleware to the default middleware stack, see below.
  • See here Show archive.org snapshot for additional details and a potential breaking change.

Mar 3rd, 2023: Rack version

  • Backported fix for [CVE-2023-27530] to address a potential DOS attack with rack multipart requests.

Jan 24th, 2023: Rails version

Jan 20th, 2023: Rails version

  • Fixed multiple ReDoS vulnerabilities in Rails: [CVE-2023-22792], [CVE-2023-22796], [CVE-2023-22795]
  • Fixed a DOS vulnerability in the PostgreSQL adapter for ActiveRecord [CVE-2022-44566]
    • ActiveRecord will now throw an exception, if you pass an integer > 64bit. You can opt out using
      config.active_record.raise_int_wider_than_64bit = false
  • Added a monkey patch to fix a ReDoS vulnerability in globalid [CVE-2023-22799]
  • See here Show archive.org snapshot for more details

Jan 20th, 2023: Rack version

Dec 21st, 2022: Rack version

  • Fixed an issue that made rails server fail with certain web servers on Ruby 3.1.

Dec 13th, 2022: Rails version

Dec 13th, 2022: Rack version

  • Based on our fork of rack.
  • Added support for ruby 3.1.
  • Includes fixes for CVE-2020-8161, CVE-2020-8184, CVE-2022-30122, CVE-2022-30123, CWE-444.
  • More info

Jul 21st, 2022: Version

Jul 14th, 2022: Version

  • Backported fix for [CVE-2022-32224] Possible RCE escalation bug with Serialized Columns in Active Record. We tried to make it less of a breaking change than the official patch by adding a default set of permitted serializable classes. see details

May 18th, 2022: Version

Apr 27th, 2022: Version

Sep 14th, 2021: Version

  • Relaxed requirement for Bundler. It is now possible to use Rails 4.2 LTS with Bundler 2 (given a compatible version of Ruby and Rubygems).

Mar 06th, 2021: Version

Feb 11th, 2021: Version

Jan 25th, 2021: Version

  • Added Ruby 2.7 compatibility.

Sep 10th, 2020: Version

Jun 17th, 2020: Announcement regarding CVE-2020-8184

May 19th, 2020: Version

May 16th, 2020: Version

May 15th, 2020: Announcement regarding CVE-2020-8161 and CVE-2018-16471

Mar 20th, 2020: Version

Dec 22nd, 2019: Announcement regarding CVE-2019-16782

Apr 11th, 2019: Version

  • Added some compatibility fixes to facilitate running Rails 4.2 LTS on Ruby 2.6.

Note: We do not officially support Ruby 2.6, so run it at your own risk. Rails unit tests pass with Ruby 2.6 as of this release.

Mar 22nd, 2019: Amendment to CVE-2019-5418

  • The previously reported CVE 2019-5418 has been upgraded to possible remote code execution. Rails LTS protects your application against this exploit.

Mar 14th, 2019: Version

  • Merged upstream fixes for ActionView format / MIME type parsing (CVE-2019-5418 and CVE-2019-5419) ( see details Show archive.org snapshot )
  • Confirmed that 4.2 LTS is not affected by CVE-2019-5420.

Oct 28th, 2018: Version

  • Improve compatibility with Rails 2.3 and 3.2 LTS by defining ActionDispatch::Http::ParamsHashWithIndifferentAccess. This fixes potentially issues for users upgrading from LTS versions < 4, and should not affect anyone else. See here for a description of the issue.

Oct 28th, 2018: Version

Oct 25th, 2018: Version

  • This release is identical to
  • There is a chance the Rails core team might release an official for security fixes after the end of the maintenance period. To avoid conflicts, we skip some versions ahead.

Sep 28th, 2018: Version

  • Initial release of the LTS version of Rails 4.2.
  • This is identical to the official 4.2.10 release, except for the additional Rails LTS hardening options.
  • Supports Ruby 2.1, 2.3, and 2.5.
Tobias Kraze
Last edit
Tobias Kraze
Source code in this card is licensed under the MIT License.
Posted by Tobias Kraze to Rails LTS documentation (2018-09-28 12:52)