Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
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| remix-run | react-router | affected |
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| Source | ID | Title |
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EUVD |
EUVD-2025-9433 | 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. |
Github GHSA |
GHSA-4q56-crqp-v477 | Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers |
No CVSS v4.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: 1.2% (1.201% probability within 30 days)
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cvssV3_1
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| Description | 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. | |
| Title | Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers | |
| Weaknesses | CWE-444 | |
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cvssV3_0
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