Vulnerability · Published Dec 3, 2025 · Assigned by redhat

CVE-2024-3884Undertow: outofmemory when parsing form data encoding with application/x-www-form-urlencoded

High 7.5

In plain English

A high-severity improper input validation in OpenShift Serverless from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)1.5%top 26.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:14	undertow	no fix listed	DEBIAN-CVE-2024-3884
Maven	io.undertow:undertow-core	2.4.0.Beta1	GHSA-6h4f-pj3g-q8fq
Maven	io.undertow:undertow-core	2.3.21.Final	GHSA-6h4f-pj3g-q8fq
Maven	io.undertow:undertow-core	2.2.39.Final	GHSA-6h4f-pj3g-q8fq
Ubuntu:25.10	undertow	no fix listed	UBUNTU-CVE-2024-3884
Ubuntu:26.04:LTS	undertow	no fix listed	UBUNTU-CVE-2024-3884
Ubuntu:26.10	undertow	no fix listed	UBUNTU-CVE-2024-3884

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4.24	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.0 for RHEL 9	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1.3	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	see references
Red Hat	Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8	see references

Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

RHSA-2026:0383 vendor-advisory, x_refsource_REDHAT
RHSA-2026:0384 vendor-advisory, x_refsource_REDHAT
RHSA-2026:0386 vendor-advisory, x_refsource_REDHAT
RHSA-2026:3889 vendor-advisory, x_refsource_REDHAT
RHSA-2026:3891 vendor-advisory, x_refsource_REDHAT
RHSA-2026:3892 vendor-advisory, x_refsource_REDHAT
RHSA-2026:4915 vendor-advisory, x_refsource_REDHAT
RHSA-2026:4916 vendor-advisory, x_refsource_REDHAT
RHSA-2026:4917 vendor-advisory, x_refsource_REDHAT
RHSA-2026:4924 vendor-advisory, x_refsource_REDHAT
RHSA-2026:6011 vendor-advisory, x_refsource_REDHAT
RHSA-2026:6012 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2024-3884 vdb-entry, x_refsource_REDHAT
RHBZ#2275287 issue-tracking, x_refsource_REDHAT