HIGH Published September 2, 2025

CVE-2025-9784

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).

CVSS base score
7.5 (v3.1)
Severity
HIGH
Attack vector
Network
Weakness
CWE-770, CWE-404
Last modified
November 4, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

redhat build of apache camel for spring boot redhat fuse redhat jboss enterprise application platform redhat jboss enterprise application platform expansion pack redhat process automation redhat single sign-on redhat undertow redhat enterprise linux

References

View full NVD advisory →

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