medium5.9
CVE-2026-44837
view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | view_component | >= 3.0.0, < 4.9.0 | 4.9.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Viewcomponent | View Component | from 3.0.0 before 4.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-hg3h-g7xc-f7vp
- https://github.com/ViewComponent/view_component/security/advisories/GHSA-hg3h-g7xc-f7vp
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/view_component/CVE-2026-44837.yml
- https://nvd.nist.gov/vuln/detail/CVE-2026-44837