GHSA-4q56-crqp-v477
Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
At a glance
- Published
- Updated
- CVE
- CVE-2025-31137
- CVSS_V3
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 packages
| Package | Versions |
|---|---|
| npm · @react-router/express | introduced 7.0.0, fixed 7.4.1 |
| npm · @remix-run/express | introduced 2.11.1, fixed 2.16.3 |
References
- https://github.com/remix-run/react-router/security/advisories/GHSA-4q56-crqp-v477 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-31137 ADVISORY
- https://github.com/remix-run/react-router PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |