CVE WatchJul 29, 2026

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, V

CVSS

6.8

Medium

EPSS

0.2%

p16

KEV

—

Exploit Today

0-100

Published: Jul 17, 2026 · Last modified: Jul 29, 2026 · CWE-362 · CWE-488 · CWE-668

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-08-092026-09-06

Technical 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.

Official references

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