How severe is CVE-2024-3884?

CVE-2024-3884 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-3884 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-3884?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-3884 have an EU (EUVD) identifier?

Yes. CVE-2024-3884 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32452.

When was CVE-2024-3884 published?

CVE-2024-3884 was published on 2025-12-03 and last updated on 2026-06-17.

CVE-2024-3884

CVE-2024-3884 is a high-severity vulnerability with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-32452
Weakness: CWE-20
Published: 2025-12-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2024-3884?: 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.
How severe is CVE-2024-3884?: CVE-2024-3884 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-3884 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-3884?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-3884 have an EU (EUVD) identifier?: Yes. CVE-2024-3884 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-32452.
When was CVE-2024-3884 published?: CVE-2024-3884 was published on 2025-12-03 and last updated on 2026-06-17.

References

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