CVE-2025-9784

EUVD-2025-26388
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).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 82.33%
Affected Products (NVD)
VendorProductVersion
redhatbuild_of_apache_camel_for_spring_boot
-
redhatfuse
7.0.0
redhatjboss_enterprise_application_platform
7.0.0
redhatjboss_enterprise_application_platform
8.0.0
redhatjboss_enterprise_application_platform_expansion_pack
-
redhatprocess_automation
7.0
redhatsingle_sign-on
7.0
redhatundertow
-
redhatenterprise_linux
8.0
redhatenterprise_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
undertow
forky
2.3.20-1
fixed
sid
2.3.20-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
resteasy
focal
needs-triage
jammy
needs-triage
noble
needs-triage
plucky
ignored
questing
ignored
resolute
needs-triage
xenial
needs-triage
undertow
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
plucky
ignored
questing
ignored
resolute
needs-triage
xenial
needs-triage