Critical Rails Flaw Could Let Unauthenticated Attackers Read Server Files via Image Uploads
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2025-24293 | # Active Storage allowed transformation methods potentially unsafe Active Storage attempts to prevent the use of potentially unsafe image transformation… | 9.2 | 5% | ||
| CVE-2026-66066 | Unauthenticated Arbitrary File Read in Ruby on Rails Active Storage | 9.5 | 30% | PoC |
From the original article
5 min read at thehackernews.com
Ruby on Rails has released fixes for a critical Active Storage vulnerability that could let unauthenticated attackers read arbitrary files from application servers through crafted image uploads. Tracked as CVE-2026-66066 (CVSS score: 9. 5), the flaw can expose the Rails process environment and secrets such as secret_key_base , the Rails master key, database passwords, cloud storage credentials, and API tokens.
By @TheHackersNews · thehackernews.com
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