Threat Investigation
Request a demo

CVE-2026-122006

Critical

Description

The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing occurs, can allow server read and write operations (e.g., reading secret_key_base) because the ImageMagick analyzer runs when a file is attached, and there is not an ImageMagick security policy to block unintended functionality.

SeverityCritical
CVSS9.8
Exploit probability—
ProductRuby On Rails Activestorage Gem
PublishedNov 4, 2026
First seenNov 4, 2026
Weakness typeCWE-1188CWE-1188

How to fix

Update
  • Ruby on Rails activestorage gem8.1.4.1 or later

Affected products

ProductAffected versionsFixed in
Ruby on Rails activestorage gemNo range specified8.1.4.1

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.