CVE-2026-54497
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 4.0.0 until 4.12.0, ViewComponent::Base instances retain render-scoped objects across calls to render_in; if the same component, collection, or spacer component instance is reused across requests, users, tenants, or threads, later renders can use stale helpers, controller, request, view_flow, format/variant details, and slot child context from an earlier render. This can cause authorization-aware components to render privileged UI for a lower-privileged user, generate links using a stale Host header, leak slot/helper state, and mix request context under concurrent rendering. This issue is fixed in version 4.12.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | view_component | >= 4.0.0, < 4.12.0 | 4.12.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Viewcomponent | View Component | from 4.0.0 before 4.12.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-9h85-g7w3-rh49
- https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49
- https://github.com/ViewComponent/view_component/commit/7b05073be28037f7d5ff141e9dd42f3cf47956a4
- https://github.com/ViewComponent/view_component/releases/tag/v4.12.0
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/view_component/CVE-2026-54497.yml
- https://www.cve.org/CVERecord/SearchResults?query=CVE-2026-54497
- https://github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61