Vulnerability Details CVE-2026-21884
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 <ScrollRestoration> 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 (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) is being used. This issue has been patched in @remix-run/react version 2.17.3 and react-router version 7.12.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 3.2%
CVSS Severity
CVSS v3 Score 8.2
Products affected by CVE-2026-21884
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cpe:2.3:a:shopify:react-router:7.0.0
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cpe:2.3:a:shopify:react-router:7.0.1
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cpe:2.3:a:shopify:react-router:7.0.2
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cpe:2.3:a:shopify:react-router:7.1.0
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cpe:2.3:a:shopify:react-router:7.1.1
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cpe:2.3:a:shopify:react-router:7.1.2
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cpe:2.3:a:shopify:react-router:7.1.3
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cpe:2.3:a:shopify:react-router:7.1.4
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cpe:2.3:a:shopify:react-router:7.1.5
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cpe:2.3:a:shopify:react-router:7.10.0
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cpe:2.3:a:shopify:react-router:7.10.1
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cpe:2.3:a:shopify:react-router:7.11.0
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cpe:2.3:a:shopify:react-router:7.2.0
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cpe:2.3:a:shopify:react-router:7.3.0
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cpe:2.3:a:shopify:react-router:7.4.0
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cpe:2.3:a:shopify:react-router:7.4.1
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cpe:2.3:a:shopify:react-router:7.5.0
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cpe:2.3:a:shopify:react-router:7.5.1
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cpe:2.3:a:shopify:react-router:7.5.2
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cpe:2.3:a:shopify:react-router:7.5.3
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cpe:2.3:a:shopify:react-router:7.6.0
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cpe:2.3:a:shopify:react-router:7.6.1
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cpe:2.3:a:shopify:react-router:7.6.2
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cpe:2.3:a:shopify:react-router:7.6.3
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cpe:2.3:a:shopify:react-router:7.7.0
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cpe:2.3:a:shopify:react-router:7.7.1
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cpe:2.3:a:shopify:react-router:7.8.0
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cpe:2.3:a:shopify:react-router:7.8.1
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cpe:2.3:a:shopify:react-router:7.8.2
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cpe:2.3:a:shopify:react-router:7.9.0
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cpe:2.3:a:shopify:react-router:7.9.1
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cpe:2.3:a:shopify:react-router:7.9.2
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cpe:2.3:a:shopify:react-router:7.9.3
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cpe:2.3:a:shopify:react-router:7.9.4
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cpe:2.3:a:shopify:react-router:7.9.5
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cpe:2.3:a:shopify:react-router:7.9.6
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cpe:2.3:a:shopify:remix-run/react:1.15.0
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cpe:2.3:a:shopify:remix-run/react:1.23.2
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cpe:2.3:a:shopify:remix-run/react:2.17.0