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Vulnerability record · CVE-2026-54497 · published 17 July 2026

CVE-2026-54497: Viewcomponent view component race condition vulnerability

Viewcomponent · View Component

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.

6.8 CVSS 3.1 Medium EPSS 0.33% · top 76.5% CWE-362 · Race conditionCWE-488 · CWE-488
6.8CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
29 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ViewComponent/view_component/commit/6796b2e89d0bd7b9d7d763a86275e5334731dd61 Patch
https://github.com/ViewComponent/view_component/releases/tag/v4.12.0 ProductRelease Notes
https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49 ExploitMitigationVendor Advisory
https://github.com/ViewComponent/view_component/security/advisories/GHSA-9h85-g7w3-rh49 ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-54497), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.