CVE-2025-47947

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Versions up to and including 2.9.8 are vulnerable to denial of service in one special case (in stable released versions): when the payload's content type is `application/json`, and there is at least one rule which does a `sanitiseMatchedBytes` action. A patch is available at pull request 3389 and expected to be part of version 2.9.9. No known workarounds are available.

ModSecurity es un motor de firewall de aplicaciones web (WAF) multiplataforma de código abierto para Apache, IIS y Nginx. Las versiones hasta la 2.9.8 incluida son vulnerables a denegación de servicio en un caso especial (en versiones estables): cuando el tipo de contenido del payload es `application/json` y existe al menos una regla que ejecuta la acción `sanitiseMatchedBytes`. Hay un parche disponible en la solicitud de incorporación de cambios 3389 y se espera que forme parte de la versión 2.9.9. No se conocen workarounds.