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Package details: pkg:maven/io.undertow/undertow-core@2.3.19.Final
purl pkg:maven/io.undertow/undertow-core@2.3.19.Final
Next non-vulnerable version 2.3.20.Final
Latest non-vulnerable version 2.4.0.Beta1
Risk 4.0
Vulnerabilities affecting this package (1)
Vulnerability Summary Fixed by
VCID-ns3p-22xg-q3bz
Aliases:
CVE-2025-9784
GHSA-95h4-w6j8-2rp8
Undertow MadeYouReset HTTP/2 DDoS Vulnerability 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).
2.3.20.Final
Affected by 0 other vulnerabilities.
Vulnerabilities fixed by this package (0)
Vulnerability Summary Aliases
This package is not known to fix vulnerabilities.

Date Actor Action Vulnerability Source VulnerableCode Version
2026-04-16T23:39:47.614961+00:00 GitLab Importer Affected by VCID-ns3p-22xg-q3bz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.undertow/undertow-core/CVE-2025-9784.yml 38.4.0
2026-04-12T01:00:31.875485+00:00 GitLab Importer Affected by VCID-ns3p-22xg-q3bz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.undertow/undertow-core/CVE-2025-9784.yml 38.3.0
2026-04-03T01:08:43.582666+00:00 GitLab Importer Affected by VCID-ns3p-22xg-q3bz https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/io.undertow/undertow-core/CVE-2025-9784.yml 38.1.0