remix-run react-router POST Request cross-site request forgery

Summaryinfo

A vulnerability has been found in remix-run react-router and classified as problematic. Affected is an unknown function of the component POST Request Handler. The manipulation leads to cross-site request forgery. This vulnerability is uniquely identified as CVE-2026-22030. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in remix-run react-router (the affected version unknown). This issue affects an unknown part of the component POST Request Handler. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. Using CWE to declare the problem leads to CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. Impacted is integrity. The summary by CVE is:

React Router is a router for React. In @remix-run/server-runtime version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, React Router (or Remix v2) is vulnerable to CSRF attacks on document POST requests to UI routes when using server-side route action handlers in Framework Mode, or when using React Server Actions in the new unstable RSC modes. There is no impact if Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/server-runtime version 2.17.3 and react-router version 7.12.0.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-22030 since 01/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 283663 (Linux Distros Unpatched Vulnerability : CVE-2026-22030), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (283663) and EUVD (EUVD-2026-1464). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• remix-run

Name

• react-router

Website

• Product: https://github.com/remix-run/react-router/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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