Vulnerability in Viewcomponent View Component
CVE-2026-54497
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Viewcomponent View Component — versions >= 4.0.0, < 4.12.0
Weakness classification (CWE)
References
- github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49 (Exploit, Mitigation, Vendor Advisory)
- github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e533… (Patch)
- github.com/ViewComponent/view_component/releases/tag/v4.12.0 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-54497?
- CVE-2026-54497 is a medium-severity vulnerability in Viewcomponent View Component, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 6.8/10. Published 2026-07-17.
- How severe is CVE-2026-54497?
- Medium severity. CVSS v3 base score is 6.8 out of 10.