Threats affecting pkg:gem/view_component/view_component

A cross-site scripting (XSS) vulnerability exists in the view_component Ruby on Rails framework versions from 4.0.0 up to but not including 4.12.0. The issue arises because ViewComponent::Base#around_render can return HTML-unsafe strings that bypass normal escaping, and ViewComponent::Collection#render_in can mark combined output as safe, potentially exposing user-controlled data. This vulnerability is fixed in version 4.12.0.

A race condition vulnerability exists in the view_component Ruby on Rails framework versions 4.0.0 up to but not including 4.12.0. The issue arises because ViewComponent::Base instances retain render-scoped objects across calls to render_in, causing stale context to be reused across requests or threads. This can lead to unauthorized UI rendering, leaking of request context, and mixing of state between users. The vulnerability is fixed in version 4.12.0.

view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the system test entrypoint canonicalizes a user-controlled file path with File.realpath, then checks whether the resolved path starts with the temp directory path. This is not a safe containment check because sibling directories can share the same string prefix. This vulnerability is fixed in 4.9.0.

view_component is a framework for building reusable, testable, and encapsulated view components in Ruby on Rails. From 3.0.0 to 4.9.0, the preview route derives an example name from the URL and calls it with public_send. The code does not verify that the requested method is one of the preview examples explicitly defined by the preview class. As a result, inherited public methods on ViewComponent::Preview are route-reachable. The most important one is render_with_template, which accepts template: and locals:. Those values can come from request params and are later passed to Rails as render template:. If previews are exposed, an attacker can render internal Rails templates that are not otherwise routable. This vulnerability is fixed in 4.9.0.