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CVE-2024-3884

Good to know:

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Date: December 3, 2025

A flaw was found in Undertow that can cause remote denial of service attacks. When the server uses the FormEncodedDataDefinition.doParse(StreamSourceChannel) method to parse large form data encoding with application/x-www-form-urlencoded, the method will cause an OutOfMemory issue. This flaw allows unauthorized users to cause a remote denial of service (DoS) attack.

Severity Score

Related Resources (16)

https://access.redhat.com/errata/RHSA-2025:22777
https://github.com/undertow-io/undertow
https://github.com/undertow-io/undertow/pull/1860
https://access.redhat.com/errata/RHSA-2025:22773
https://access.redhat.com/errata/RHSA-2025:22775
https://github.com/undertow-io/undertow/releases/tag/2.3.21.Final
https://access.redhat.com/errata/RHSA-2025:3992
https://access.redhat.com/security/cve/CVE-2024-3884
https://access.redhat.com/errata/RHSA-2025:3990
https://github.com/undertow-io/undertow/pull/1856
https://nvd.nist.gov/vuln/detail/CVE-2024-3884
https://bugzilla.redhat.com/show_bug.cgi?id=2275287
https://access.redhat.com/errata/RHSA-2026:0386
https://access.redhat.com/errata/RHSA-2026:0383
https://access.redhat.com/errata/RHSA-2026:0384
https://www.mend.io/vulnerability-database/CVE-2024-3884

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

Top Fix

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Upgrade Version

Upgrade to version io.undertow:undertow-core:2.3.21.Final;io.undertow:undertow-core:https://github.com/advisories/GHSA-6h4f-pj3g-q8fq

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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