CVE-2025-9784

Aliases:GHSA-95h4-w6j8-2rp8
Advisory lineage Upstream: 0 Downstream: 9
Modified
Published: 02 Sept 2025, 13:37
Last modified:06 May 2026, 14:33

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
2.23% LOW
2% probability +1.80%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

02 Sept 2025, 13:37
Published
Vulnerability first disclosed
06 May 2026, 14:33
Last Modified
Vulnerability information updated

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).

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 2.23%• Percentile: 85%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

  • CWE-404•Improper Resource Shutdown or Release

    The product does not release or incorrectly releases a resource before it is made available for re-use.

Affected Systems

  • io.undertow•undertow-core

    < 2.2.38.Final | ≥ 2.3.0.Alpha1, < 2.3.20.Final

  • redhat•build_of_apache_camel_for_spring_boot

    na

  • redhat•enterprise_linux

    8.0 | 9.0

  • redhat•fuse

    7.0.0

  • redhat•jboss_enterprise_application_platform

    7.0.0 | 8.0.0

  • redhat•jboss_enterprise_application_platform_expansion_pack

    na

  • redhat•process_automation

    7.0

  • redhat•single_sign-on

    7.0

  • redhat•undertow

    na

References (24)