Ruby on Rails Files

Active Support

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Active Model

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Active Record

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Action View

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Action Pack

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Active Job

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Action Mailer

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Action Cable

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Active Storage

• Disable libvips's unfuzzed image loaders and savers.

  libvips flags some of its loaders and savers as "unfuzzed" or "untrusted", meaning they are only safe for trusted content. Active Storage will call Vips.block_untrusted(true) to disable them while booting. An application that needs a specific loader or saver may re-enable it in an initializer.

  This is a breaking change for applications that process image types with an unfuzzed loader or saver. Variant transformation of BMP, ICO, and PSD attachments will raise Vips::Error, and analysis of these and other types such as SVG, JPEG XL, JPEG 2000, and Netpbm will no longer record width and height. Requesting an unfuzzed output format, typically FITS, JXL, or anything delegated to ImageMagick, will also raise Vips::Error. Attaching, storing, and downloading are unchanged.

  An application seeing Vips::Error raised during image transformation may wish to remove the affected content types from config.active_storage.variable_content_types in an initializer. Active Storage will then treat those attachments as not variable and will not generate variants for them. This most often matters to an application that transforms images during a request rather than in a background job, where the failure surfaces as an error response instead of a failed job.

  ruby Rails.application.config.active_storage.variable_content_types -= %w[ image/bmp image/vnd.microsoft.icon image/vnd.adobe.photoshop ]

  Applications using the :mini_magick variant processor will see no change in how their attachments are processed, but the loaders and savers will be disabled process-wide whenever ruby-vips is installed, and the version requirements below will still apply. Such an application may remove ruby-vips from its Gemfile to avoid both.

  The minimum supported version of libvips is now 8.13, and the minimum supported version of ruby-vips is now 2.2.1. These are the earliest versions that are capable of disabling untrusted operations. When ruby-vips is installed and either minimum is not met, Active Storage will raise a RuntimeError while booting rather than run in an unsecurable environment.

  [GHSA-xr9x-r78c-5hrm] [CVE-2026-66066]

  Mike Dalessio

Action Mailbox

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Action Text

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Railties

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Guides

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