GHSA-4q56-crqp-v477
Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @react-router/express | >= 7.0.0, < 7.4.1 | 7.4.1 |
| npm | @remix-run/express | >= 2.11.1, < 2.16.3 | 2.16.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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_)
References
External links from the advisory. They lead to third-party sites.