{"schemaVersion":3,"id":"CVE-2025-31137","aliases":["GHSA-4q56-crqp-v477"],"status":"published","duplicateOf":null,"title":null,"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. 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