GHSA-4q56-crqp-v477HighCVSS 7.5

Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers

Published
April 1, 2025
Last Modified
April 1, 2025

🔗 CVE IDs covered (1)

CVE-2025-31137 →

📋 Description

Impact

We received a report about a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an incoming Request by putting a URL pathname in the port section of a URL that is part of a Host or X-Forwarded-Host header sent to a Remix/React Router request handler.

Patches

This issue has been patched and released in Remix 2.16.3 React Router 7.4.1.

Credits

  • Rachid Allam (zhero;)
  • Yasser Allam (inzo_)

🎯 Affected products2

  • npm/@react-router/express:>= 7.0.0, < 7.4.1
  • npm/@remix-run/express:>= 2.11.1, < 2.16.3

🔗 References (3)