CVE-2026-44837
Medium
Description
view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the system test entrypoint canonicalizes a user-controlled file path with File.realpath, then checks whether the resolved path starts with the temp directory path. This is not a safe containment check because sibling directories can share the same string prefix. This vulnerability is fixed in 4.9.0.
SeverityMedium
CVSS5.9
Exploit probability—
ProductViewcomponent View Component
PublishedMay 26, 2026
First seenMay 26, 2026
Weakness typeCWE-187CWE-187
How to fix
Update
- viewcomponent view_component4.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| viewcomponent view_component | 3.0.0 ≤ v < 4.9.0 | 4.9.0 |
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