CVE-2026-54497
view_component: Reused Component Instances Retain Stale Render Context
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
- ViewComponent · view_component
- CVSS v3.1 GITHUB
- 6.8 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N - EPSS
- 0.33% chance of exploitation in the next 30 days, 25th percentile
- Published
- 2026-07-17
- Updated
- 2026-07-20
Proof-of-concept exploits (1)
Security advisories
- ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49
- ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61