Critical Active Storage flaw risks app secrets
🛡️ Ruby on Rails released patches for a critical Active Storage vulnerability (CVE-2026-66066) that can let unauthenticated attackers read arbitrary files via crafted image uploads. The issue affects applications using libvips for image processing and can expose secrets like secret_key_base, master keys, database credentials, and API tokens. Operators should upgrade Rails and libvips, and rotate any credentials potentially accessible to the Rails process.