CVE-2024-4027
Unknown
Unknown - Not Provided
OutOfMemoryError DoS in Undertow via Large Parameter Names
Publication date: 2026-01-30
Last updated on: 2026-01-30
Assigner: Red Hat, Inc.
Description
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 Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| unknown_vendor | undertow | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-20 | The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a flaw in Undertow where servlets that use a method calling HttpServletRequestImpl.getParameterNames() can trigger an OutOfMemoryError if a client sends a request with very large parameter names. This can be exploited remotely by an unauthorized user to cause a denial-of-service (DoS) attack.
How can this vulnerability impact me? :
The vulnerability can impact you by allowing an unauthorized attacker to remotely cause a denial-of-service (DoS) condition on your server, potentially making your application unavailable due to an OutOfMemoryError.
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