CVE-2026-44837
view_component: System Test Entry Point Path Check Allows Sibling Directory Escape
- State
- Published
- Severity
- 5.9 Medium
- Published
- May 26, 2026
- Updated
- May 28, 2026
- Reserved
- May 7, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.9 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | GitHub_M |
Weaknesses
- CWE-187 Partial String Comparison
Affected Products
| Product | Versions |
|---|---|
view_componentViewComponent |
|
References
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