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CVE-2026-122006

Quick assessment

Affected
rubyonrails Active Storage
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Ruby on Rails 中，版本 8.1.4.1 之前的 activestorage gem 在执行 ImageMagick 附件处理时，可能允许服务器执行读取和写入操作（例如读取 secret_key_base）。这是因为 ImageMagick 分析器会在文件上传时运行，而系统中并未配置 ImageMagick 安全策略来阻止此类非预期的功能。

CVSS 9.8 · Critical EPSS 0.69% · P53

Affected Version Matrix 2

VendorProduct Version RangeStatus
rubyonrails Active Storage < 8.0.5.2 affected
8.1< 8.1.4.1 affected
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I. Basic Information for CVE-2026-122006

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不安全的默认资源初始化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rubyonrails Active Storage 0 ~ 8.0.5.2 -

II. Public POCs for CVE-2026-122006

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III. Intelligence Information for CVE-2026-122006

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Other References for CVE-2026-122006 (3)

IV. Related Vulnerabilities

Same vendor: rubyonrails
Same weakness: CWE-1188