CVE-2026-28369: Undertow Request Smuggling Vulnerability
Plattform
java
Komponente
undertow
Behoben in
2.5.4
CVE-2026-28369 is a security vulnerability discovered in Undertow, a widely used Java servlet container. The flaw arises from Undertow's improper handling of HTTP requests where the first header line contains leading spaces, violating HTTP standards. This incorrect processing enables request smuggling, potentially allowing attackers to bypass security controls, access sensitive information, or manipulate web caches, leading to unauthorized actions or data exposure. The vulnerability affects Undertow versions prior to a patch being released.
So beheben
Kein offizieller Patch verfügbar. Prüfe auf Workarounds oder überwache auf Updates.
Häufig gestellte Fragen
What is CVE-2026-28369?
CVE-2026-28369 is a request smuggling vulnerability in Undertow. It occurs when Undertow incorrectly handles HTTP requests with leading spaces in the header lines, allowing attackers to potentially bypass security measures and manipulate web caches.
Am I affected by CVE-2026-28369?
You are potentially affected if you are using Undertow versions prior to a patch. Carefully review your Undertow deployment and update to a secure version as soon as a patch becomes available.
How can I fix or mitigate CVE-2026-28369?
The recommended solution is to update to a patched version of Undertow once available. Until then, consider implementing strict HTTP header validation and filtering to prevent requests with leading spaces in header lines from reaching Undertow.
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