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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-021479 advisory.

    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.

Tenable has extracted the preceding description block directly from the Unity Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2024-4027)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2024-4027)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
315160	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: undertow (UTSA-2026-021479)	Nessus	Unity Linux Local Security Checks	high
437408	SCA: security update for io.undertow:undertow-core (GHSA-33hj-rcmx-86mv)	Tenable Cloud Security	SCA Checks	high
437408	SCA: security update for io.undertow:undertow-core (GHSA-33hj-rcmx-86mv)	Tenable Self-Hosted Container Security	SCA Checks	high
297408	Linux Distros Unpatched Vulnerability : CVE-2024-4027	Nessus	Misc.	high

Detections

Analytics

CVE-2024-4027

high

Tenable Plugins

high

high

high

high