CVE-2026-28369: Undertow Request Smuggling Vulnerability
Platform
java
Component
undertow
Fixed in
2.5.4
CVE-2026-28369 describes a request smuggling vulnerability found in Undertow. The flaw occurs when Undertow incorrectly processes HTTP requests with leading spaces in the first header line, violating HTTP standards. This can be exploited by a remote attacker to perform request smuggling, potentially leading to unauthorized actions or data exposure. There is no official patch available.
How to fix
Actualice Undertow a la versión 2.5.4 o superior para mitigar la vulnerabilidad. Esta actualización corrige el manejo incorrecto de encabezados HTTP que pueden permitir el 'request smuggling'. Consulte la documentación oficial de Red Hat para obtener instrucciones específicas de actualización para los productos afectados.
Frequently asked questions
What is CVE-2026-28369?
CVE-2026-28369 is a request smuggling vulnerability in the Undertow web server. It arises from the improper handling of leading spaces in HTTP header lines, violating HTTP standards.
Am I affected by CVE-2026-28369?
You are potentially affected if you are using Undertow as your web server. The vulnerability allows attackers to bypass security mechanisms and potentially access restricted information.
How can I fix or mitigate CVE-2026-28369?
Currently, there is no official patch available. Mitigation strategies may involve implementing stricter input validation and sanitization on the application level to prevent request smuggling attacks.
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