KindaRails2Shell (CVE-2026-66066): Arbitrary File Read and RCE via Active Storage...
KindaRails2Shell (CVE-2026-66066): Arbitrary File Read and RCE via Active Storage Uploads
1. Basic Information
Article Title: Alert on Vulnerability in Ruby on Rails Active Storage Leading to Remote Code Execution
Publisher: JPCERT/CC
Publication & Update Date: 2026-07-30
The vulnerability abuses Active Storage, allowing unauthenticated attackers to read sensitive files and potentially take over…
A critical vulnerability in the Active Storage framework can allow an unauthenticated attacker to read arbitrary files from a…
CVE-2026-66066 could expose Rails server files through image uploads, leaking secrets that may enable RCE or lateral movement.
A critical Active Storage vulnerability allows arbitrary file read and possible remote code execution through libvips variant…
Through compromised images, attackers can read out server environment variables, including secrets, and thus open further doors…
Ruby on Rails has patched CVE-2026-66066, a critical vulnerability leading to unauthenticated file reads and potentially RCE.
Critical Rails Flaw Could Let Unauthenticated Attackers Read Server Files via Image Uploads
