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CVE-2026-21884

HIGH CVSS: 8.2 Published: 2026-01-10 Modified: 2026-07-15

Description

React Router is a router for React. In @remix-run/react version prior to 2.17.3. and react-router 7.0.0 through 7.11.0, a XSS vulnerability exists in in React Router's API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the keys. There is no impact if server-side rendering in Framework Mode is disabled, or if Declarative Mode () or Data Mode (createBrowserRouter/) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.

Affected Platforms

Shopify Remix-Run\/ReactShopify React-Router

Weakness Type

CWE-79, CWE-79

References