Packages / react-router / Security

ModerateVulnerabilityGHSA-2j2x-hqr9-3h42CVE-2026-40181Published 3 Jun 2026

React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation

Affected releases · react-router

  • 7.x7.0.0 – 7.14.0Fixed in 7.14.1
  • 6.x6.7.0 – 6.30.3Fixed in 6.30.4

On 7.x, the newest line:

npm install react-router@7.14.1
8.x

  1. Not affected

    8.0.0 – 8.5.0

    8 releases, latest

7.x

  1. Affected

    7.0.0 – 7.14.0

    41 releases

  2. Fixed

    7.14.1 – 7.18.4

    11 releases

6.x

  1. Not affected

    6.0.0 – 6.6.2

    19 releases

  2. Affected

    6.7.0 – 6.30.3

    48 releases

  3. Fixed

    6.30.4 – 6.30.6

    3 releases

228 stable releases of react-router, oldest to newest, one row per major.

Is your project affected?

Paste your package.json, or type the range you declare for react-router. It is read in your browser and sent nowhere.

What happens

Certain URLs passed to the redirect function can trigger an open redirect to an external domain depending on the level of validation done by the application prior to returning the redirect.

[!NOTE] This does not impact your React Router application if you are using Declarative Mode (<BrowserRouter>)