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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-9784 Detail

Description

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).


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://access.redhat.com/security/cve/CVE-2025-9784 Red Hat, Inc. Vendor Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=2392306 Red Hat, Inc. Issue Tracking 
https://github.com/undertow-io/undertow/pull/1778 Red Hat, Inc.
https://issues.redhat.com/browse/UNDERTOW-2598 Red Hat, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-404 Improper Resource Shutdown or Release CISA-ADP  
CWE-770 Allocation of Resources Without Limits or Throttling Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-9784
NVD Published Date:
09/02/2025
NVD Last Modified:
09/24/2025
Source:
Red Hat, Inc.