CVE-2025-9784 – Undertow Denial of Service (DoS) – MadeYouReset Attack

The following table lists the changes that have been made to the
CVE-2025-9784 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • CVE Modified
    by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 02, 2025

    Action Type Old Value New Value
    Added CWE CWE-404
    Removed CWE CWE-400
  • New CVE Received
    by [email protected]

    Sep. 02, 2025

    Action Type Old Value New Value
    Added 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).
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added Reference https://access.redhat.com/security/cve/CVE-2025-9784
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2392306
  • CVE Modified
    by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Sep. 02, 2025

    Action Type Old Value New Value
    Added CWE CWE-400
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