High severity · published Jan 30, 2026
CVE-2024-4027
Undertow: outofmemoryerror in httpservletrequestimpl.getparameternames() can cause remote dos attacks
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
A flaw was found in Undertow. Servlets using a method that calls HttpServletRequestImpl.getParameterNames() can cause an OutOfMemoryError when the client sends a request with large parameter names. This issue can be exploited by an unauthorized user to cause a remote denial-of-service (DoS) attack.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Fuse 7 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat Integration Camel K 1 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat Process Automation 7 · Red Hat
All versions, or not specified · source: vendor, CISA
RH
Red Hat build of Apicurio Registry 2 · Red Hat
All versions, or not specified · source: vendor, CISA
Affected product
RH
Red Hat build of Apicurio Registry 2
Red Hat
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-4027
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-4027
access.redhat.com
https://access.redhat.com/security/cve/CVE-2024-4027
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2276410
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-4027.json
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