Critical Rails Flaw Could Let Unauthenticated Attackers Read Server Files via Image Uploads

AI Summary

Ruby on Rails patched CVE-2026-66066 (CVSS 9.5), a critical Active Storage vulnerability allowing unauthenticated attackers to read arbitrary files from application servers via crafted image uploads, potentially exposing secret_key_base, master keys, database passwords, and cloud storage credentials. Any Rails application using Active Storage for image handling should treat this as an emergency patch priority.

Read full article → https://thehackernews.com/2026/07/critical-rails-f…

Relevance score: 81.0/100

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