CVE-2025-31137
CVE-2025-31137 · Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
This page contains facts from public vulnerability sources. Check the original advisory before updating.
React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is 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. This issue has been patched and released in Remix 2.16.3 and React Router 7.4.1.
CVSS 7.5 · High · EPSS 1.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
react-router
- Versions
- >= 7.0.0, < 7.4.1: Affected
- >= 2.11.1, < 2.16.3: Affected
No fix published
@react-router/express npm
- Affected ranges
- SEMVER: ≥ 7.0.0, < 7.4.1
Update to 7.4.1
@remix-run/express npm
- Affected ranges
- SEMVER: ≥ 2.11.1, < 2.16.3
Update to 2.16.3