CVE-2026-44837
view_component: System Test Entry Point Path Check Allows Sibling Directory Escape
HIGH 7.5EPSS 0.4%
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.
- Affected
- ViewComponent · view_component
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS v3.1 GITHUB
- 5.9 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS
- 0.37% chance of exploitation in the next 30 days, 29th percentile
- Published
- 2026-05-26
- Updated
- 2026-05-28