CVE-2025-9784 HIGH

CVE-2025-9784: Undertow: undertow madeyoureset http/2 ddos vulnerability

Vendor Red Hat
Product Red Hat build of Apache Camel 4.14.2 for Spring Boot 3.5.8
Weakness CWE-770 · Uncontrolled resource consumption
Published September 2, 2025
Last update June 30, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

A flaw was found in Undertow where malformed client requests can trigger server-side stream resets without triggering abuse counters. This issue, referred to as the "MadeYouReset" attack, allows malicious clients to induce excessive server workload by repeatedly causing server-side stream aborts. While not a protocol bug, this highlights a common implementation weakness that can be exploited to cause a denial of service (DoS).

Key dates

02Disclosure timeline

September 2, 2025 CVE published
June 30, 2026 Record updated