As cited
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vulnerabilities
Critical Rails Flaw Could Let Unauthenticated Attackers Read Server Files via Image Uploads
Ruby on Rails released patches for a critical Active Storage vulnerability (CVE-2026-66066, CVSS 9.5) that allows unauthenticated attackers to read arbitrary server files through specially crafted image uploads. The flaw could expose sensitive data including environment variables, secret keys, database passwords, and cloud storage credentials stored on vulnerable application servers.
Why it matters: Rails application operators must apply patches immediately; any public-facing Rails application accepting image uploads is at risk of credential and secret exposure without authentication required.
- Source published
- First seen by Cybersecurity Tracker
Source attribution
Correction
Correction recorded as of .
vulnerabilities
Critical Rails Flaw Could Let Unauthenticated Attackers Read Server Files via Image Uploads
Ruby on Rails released patches for a critical Active Storage vulnerability (CVE-2026-66066, CVSS 9.5) that allows unauthenticated attackers to read arbitrary server files through specially crafted image uploads. The flaw could expose sensitive data including environment variables, secret keys, database passwords, and cloud storage credentials stored on vulnerable application servers.
Why it matters: Rails application operators must apply patches immediately; any public-facing Rails application accepting image uploads is at risk of credential and secret exposure without authentication required.
- Source published
- First seen by Cybersecurity Tracker