React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been fixed in version 7.18.0.

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

  - React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be     accessed via unauthenticated targeted requests that would put heavy load on the server and slow down     response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router     applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
    This issue has been fixed in version 7.18.0. (CVE-2026-55685)

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:

  - React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be
    accessed via unauthenticated targeted requests that would put heavy load on the server and slow down
    response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router
    applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
    This issue has been fixed in version 7.18.0. (CVE-2026-55685)

ID	Name	Product	Family	Type	Severity
331742	Linux Distros Unpatched Vulnerability : CVE-2026-55685	Nessus	Misc.	Local	high
445289	SCA: security update for react-router (GHSA-chx6-hx7r-mcp5)	Tenable Cloud Security	SCA Checks	Local	high
445289	SCA: security update for react-router (GHSA-chx6-hx7r-mcp5)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-55685

high

Tenable Plugins

high

high

high