VULNERABILITY INTELLIGENCE
CVE-2025-9784
CVSS score7.5 HIGH
EPSS probability2.33%
CISA KEVNot currently listed
Published2025-09-02
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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).
Weakness classification
- CWE-404: Improper Resource Shutdown or Release
- CWE-770: Allocation of Resources Without Limits or Throttling