ImageMagick Processing Vulnerability in Ruby on Rails ActiveStorage
CVE-2026-122006

9.8CRITICAL

Key Information:

Vendor

Rubyonrails

Status
Active Storage
Vendor
CVE Published:
4 November 2026

What is CVE-2026-122006?

The ActiveStorage gem in Ruby on Rails versions prior to 8.1.4.1 contains a vulnerability related to ImageMagick attachment processing. When a file is attached, the ImageMagick analyzer executes, potentially allowing unauthorized read and write operations on the server. This could lead to the exposure of sensitive data, such as the secret_key_base, primarily because there is no associated ImageMagick security policy to prevent such unintended actions. It is crucial to upgrade to the latest version to mitigate this risk and enhance server security.

Affected Version(s)

Active Storage 0 < 8.0.5.2

Active Storage 8.1 < 8.1.4.1

References

https://github.com/rails/rails/security/advisories/GHSA-f...
https://github.com/rails/rails/releases/tag/v8.1.4.1
https://github.com/rails/rails/releases/tag/v8.0.5.2

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.