CVE-2026-44836
view_component: Preview Route Can Dispatch Inherited Helper Methods
Description
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.
INFO
Published Date :
May 26, 2026, 9:16 p.m.
Last Modified :
July 24, 2026, 11:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update ViewComponent to version 4.9.0 or later.
- Ensure preview routes are not exposed.
- Review and restrict access to sensitive templates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-44836.
| URL | Resource |
|---|---|
| https://github.com/ViewComponent/view_component/security/advisories/GHSA-7f3r-gwc9-2995 | |
| https://github.com/ViewComponent/view_component/security/advisories/GHSA-7f3r-gwc9-2995 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-44836 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-44836
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-44836 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-44836 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Changed Translation Title: view_component de ViewComponent, Description: view_component es un framework para construir componentes de vista reutilizables, testeables y encapsulados en Ruby on Rails. Desde la versión 3.0.0 hasta la 4.9.0, la ruta de previsualización (preview route) deriva un nombre de ejemplo de la URL y lo invoca con public_send. El código no verifica que el método solicitado sea uno de los ejemplos de previsualización definidos explícitamente por la clase de previsualización (preview class). Como resultado, los métodos públicos heredados en ViewComponent::Preview son accesibles a través de la ruta (route-reachable). El más importante es render_with_template, que acepta template: y locals:. Esos valores pueden provenir de los parámetros de la solicitud (request params) y luego se pasan a Rails como render template:. Si las previsualizaciones (previews) están expuestas, un atacante puede renderizar plantillas internas de Rails que de otro modo no serían enrutables. Esta vulnerabilidad se corrige en la versión 4.9.0. Title: view_component de ViewComponent, Description: view_component es un framework para construir componentes de vista reutilizables, testeables y encapsulados en Ruby on Rails. Desde la versión 3.0.0 hasta la 4.9.0, la ruta de previsualización (preview route) deriva un nombre de ejemplo de la URL y lo invoca con public_send. El código no verifica que el método solicitado sea uno de los ejemplos de previsualización definidos explícitamente por la clase de previsualización (preview class). Como resultado, los métodos públicos heredados en ViewComponent::Preview son accesibles a través de la ruta (route-reachable). El más importante es render_with_template, que acepta template: y locals:. Esos valores pueden provenir de los parámetros de la solicitud (request params) y luego se pasan a Rails como render template:. Si las previsualizaciones (previews) están expuestas, un atacante puede renderizar plantillas internas de Rails que de otro modo no serían enrutables. Esta vulnerabilidad se corrige en la versión 4.9.0. -
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: view_component de ViewComponent, Description: view_component es un framework para construir componentes de vista reutilizables, testeables y encapsulados en Ruby on Rails. Desde la versión 3.0.0 hasta la 4.9.0, la ruta de previsualización (preview route) deriva un nombre de ejemplo de la URL y lo invoca con public_send. El código no verifica que el método solicitado sea uno de los ejemplos de previsualización definidos explícitamente por la clase de previsualización (preview class). Como resultado, los métodos públicos heredados en ViewComponent::Preview son accesibles a través de la ruta (route-reachable). El más importante es render_with_template, que acepta template: y locals:. Esos valores pueden provenir de los parámetros de la solicitud (request params) y luego se pasan a Rails como render template:. Si las previsualizaciones (previews) están expuestas, un atacante puede renderizar plantillas internas de Rails que de otro modo no serían enrutables. Esta vulnerabilidad se corrige en la versión 4.9.0. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'ViewComponent', 'product': 'view_component', 'versions': [{'status': 'affected', 'version': '>= 3.0.0, < 4.9.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-44836', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-05-27T13:21:32.395983Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 27, 2026
Action Type Old Value New Value Added Reference https://github.com/ViewComponent/view_component/security/advisories/GHSA-7f3r-gwc9-2995 -
New CVE Received by [email protected]
May. 26, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-749 Added Reference https://github.com/ViewComponent/view_component/security/advisories/GHSA-7f3r-gwc9-2995