CVE-2026-28369 - Vulnerability Analysis

Overview

Undertow contains an HTTP request smuggling vulnerability caused by incorrect processing of header lines starting with spaces, letting remote attackers bypass security and manipulate requests, exploit requires crafted HTTP requests.

Severity & Score

Impact

Remote attackers can bypass security controls, access restricted data, or manipulate web caches, leading to unauthorized actions or data exposure.

Mitigation

Update to the latest version of Undertow.

References

• https://access.redhat.com/security/cve/CVE-2026-28369
• https://bugzilla.redhat.com/show_bug.cgi?id=2443262

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 27, 2026

🟠 CVE-2026-28369 - High (8.7) A flaw was found in Undertow. When Undertow receives an HTTP request where the first header line starts with one or more spaces, it incorrectly processes the request by stripping these leading spaces. This behavior, which violates HTTP standards, ... 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-28369/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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