rails-activestorage-vips-audit

rails-activestorage-vips-audit An Agent Skill that audits Ruby on Rails repositories for exposure to CVE-2026-66066 KindaRails2Shell — the Active Storage libvips variant-processing vulnerability that allows arbitrary file read and, in a Rails application, remote code execution. The skill is a...

CVE-2026-66066 Action Pack: Possible arbitrary file read and remote code execution in Active Storage variant processing

Action Pack is a framework for handling and responding to web requests. In versions prior to 7.2.3.2, 8.0.5.1 and 8.1.3.1, Active Storage does not disable libvips operations marked unsafe for untrusted content, allowing a crafted upload to invoke such an operation. Consuming applications are...

CVE-2026-66066: Defending Against the “KindaRails2Shell” Pre-Auth RCE

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Ruby on Rails Active Storage Vips Arbitrary File Read and Remote Code Execution

This module exploits CVE-2026-66066 in Ruby on Rails Active Storage when the application uses the Vips variant processor and accepts untrusted image uploads. A crafted MATLAB v7.3/HDF5 image uses external storage to read text files accessible to the Rails worker through a PNG representation...