CVE-2026-33167

Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.

CVSS

No CVSS.

References

Link	Resource
https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0
https://github.com/rails/rails/releases/tag/v8.1.2.1
https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6

Configurations

No configuration.

History

17 Jun 2026, 10:37

Type	Values Removed	Values Added
Summary		(es) Action Pack es una Rubygem para construir aplicaciones web en el framework de Rails. En versiones de la rama 8.1 anteriores a la 8.1.2.1, la página de excepciones de depuración no escapa correctamente los mensajes de excepción. Un mensaje de excepción cuidadosamente elaborado podría inyectar HTML y JavaScript arbitrarios en la página, lo que lleva a XSS. Esto afecta a las aplicaciones con páginas de excepción detalladas habilitadas (`config.consider_all_requests_local = true`), lo cual es el valor predeterminado en desarrollo. La versión 8.1.2.1 contiene un parche.

23 Mar 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-23 23:17

Updated : 2026-06-17 10:37

NVD link : CVE-2026-33167

Mitre link : CVE-2026-33167

CVE.ORG link : CVE-2026-33167

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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