Vulnerability · Published Jul 17, 2026 · Assigned by GitHub_M
CVE-2026-54497view_component: Reused Component Instances Retain Stale Render Context
Medium 6.8
In plain English
A medium-severity race condition in view_component from ViewComponent. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| RubyGems | view_component | 4.12.0 | GHSA-9h85-g7w3-rh49 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ViewComponent | view_component | >= 4.0.0, < 4.12.0 |
Weakness: CWE-362, CWE-488, CWE-668 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49 x_refsource_CONFIRM
- https://github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61 x_refsource_MISC
- https://github.com/ViewComponent/view_component/releases/tag/v4.12.0 x_refsource_MISC