ViewComponent view_component up to 4.8.x on Rails routine

Summaryinfo

A vulnerability was found in ViewComponent view_component up to 4.8.x on Rails. It has been rated as problematic. This affects an unknown function. The manipulation leads to routine. This vulnerability is listed as CVE-2026-44836. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in ViewComponent view_component up to 4.8.x on Rails. It has been rated as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a routine vulnerability. Using CWE to declare the problem leads to CWE-749. The product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted. Impacted is confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-44836 since 05/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 317991 (Linux Distros Unpatched Vulnerability : CVE-2026-44836), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.9.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (317991). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• ViewComponent

Name

• view_component

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8

Website

• Product: https://github.com/ViewComponent/view_component/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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