# CVE-2024-4027

## Summary

- **CVE ID:** CVE-2024-4027
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-20
- **Published:** Jan 30, 2026
- **Last Modified:** Sep 1, 2026

## 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.

## Affected Products

No affected products listed.

## References

- [CNA](https://access.redhat.com/security/cve/CVE-2024-4027)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2276410)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-4027.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 29.3

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._