Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4.

The version of Next.js installed on the remote host is 11.1.4 prior to 12.3.6, 13.0.x prior to 13.5.10, 14.x prior to 14.2.26 or 15.x prior to 15.2.4. It is, therefore, affected by an information disclosure vulnerability where the x-middleware-subrequest-id header may be leaked to external hosts.

Note that the scanner has not attempted to exploit this issue but has instead relied only on application's self-reported version number.

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

  - Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js     validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this     subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js     application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-     subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4.
    (CVE-2025-30218)

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

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

  - Next.js is a React framework for building full-stack web applications. To mitigate CVE-2025-29927, Next.js
    validated the x-middleware-subrequest-id which persisted across multiple incoming requests. However, this
    subrequest ID is sent to all requests, even if the destination is not the same host as the Next.js
    application. Initiating a fetch request to a third-party within Middleware will send the x-middleware-
    subrequest-id to that third party. This vulnerability is fixed in 12.3.6, 13.5.10, 14.2.26, and 15.2.4.
    (CVE-2025-30218)

ID	Name	Product	Family	Type	Severity
115785	Next.js 15.x < 15.2.4 Information Disclosure	Web App Scanning	Component Vulnerability	Version Based	medium
115784	Next.js 14.x < 14.2.26 Information Disclosure	Web App Scanning	Component Vulnerability	Version Based	medium
115783	Next.js 13.x < 13.5.10 Information Disclosure	Web App Scanning	Component Vulnerability	Version Based	medium
115782	Next.js 11.1.4 < 12.3.6 Information Disclosure	Web App Scanning	Component Vulnerability	Version Based	medium
260220	Linux Distros Unpatched Vulnerability : CVE-2025-30218	Nessus	Misc.	Local	medium
423641	SCA: security update for next (GHSA-223j-4rm8-mrmf)	Tenable Cloud Security	SCA Checks	Local	medium
423641	SCA: security update for next (GHSA-223j-4rm8-mrmf)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2025-30218

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium