CVE-2025-9784CWE-404CWE-770denial-of-service

CVE-2025-9784

High · published September 2, 2025

CVSS v3.1
7.5
EPSS
2%
Percentile
83.4
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.02325 · 83.4th percentile
Weaknesses
CWE-404 · Improper Resource Shutdown or Release; CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2025-09-02T18:15Z
Affected products (10)
ProductVersionsFixed in
redhat/build_of_apache_camel_for_spring_bootall versions—
redhat/fuseall versions—
redhat/jboss_enterprise_application_platformall versions—
redhat/jboss_enterprise_application_platformall versions—
redhat/jboss_enterprise_application_platform_expansion_packall versions—
redhat/process_automationall versions—
redhat/single_sign-onall versions—
redhat/undertowall versions—
redhat/enterprise_linuxall versions—
redhat/enterprise_linuxall versions—
References (25)
https://access.redhat.com/errata/RHSA-2025:23143 · [email protected]https://access.redhat.com/errata/RHSA-2026:0383 · [email protected]https://access.redhat.com/errata/RHSA-2026:0384 · [email protected]https://access.redhat.com/errata/RHSA-2026:0386 · [email protected]https://access.redhat.com/errata/RHSA-2026:33371 · [email protected]https://access.redhat.com/errata/RHSA-2026:33372 · [email protected]https://access.redhat.com/errata/RHSA-2026:3889 · [email protected]https://access.redhat.com/errata/RHSA-2026:3891 · [email protected]https://access.redhat.com/errata/RHSA-2026:3892 · [email protected]https://access.redhat.com/errata/RHSA-2026:4915 · [email protected]https://access.redhat.com/errata/RHSA-2026:4916 · [email protected]https://access.redhat.com/errata/RHSA-2026:4917 · [email protected]https://access.redhat.com/errata/RHSA-2026:4924 · [email protected]https://access.redhat.com/errata/RHSA-2026:76128 · [email protected]https://access.redhat.com/errata/RHSA-2026:76129 · [email protected]https://access.redhat.com/errata/RHSA-2026:76130 · [email protected]https://access.redhat.com/errata/RHSA-2026:76132 · [email protected]https://access.redhat.com/errata/RHSA-2026:76134 · [email protected]https://access.redhat.com/security/cve/CVE-2025-9784 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2392306 · [email protected]https://github.com/undertow-io/undertow/pull/1778 · [email protected]https://github.com/undertow-io/undertow/releases/tag/2.2.38.Final · [email protected]https://issues.redhat.com/browse/UNDERTOW-2598 · [email protected]https://kb.cert.org/vuls/id/767506 · [email protected]https://www.kb.cert.org/vuls/id/767506 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 02 SEP 13:37Z
    Undertow: undertow madeyoureset http/2 ddos vulnerability
    cvelistv5