CVE-2026-21884
HIGHReact Router 7.0.0-7.11.0 & @remix-run/react < 2.17.3 - XSS via ScrollRestoration API
Title source: llmDescription
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.
References (1)
Core 1
Core References
Third Party Advisory x_refsource_confirm
https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7
Scores
CVSS v3
8.2
EPSS
0.0002
EPSS Percentile
6.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-79
Status
published
Products (4)
npm/react-router
7.0.0 - 7.12.0npm
remix-run/react
0 - 2.17.3npm
shopify/react-router
7.0.0 - 7.11.0
shopify/remix-run\/react
< 2.17.3
Published
Jan 10, 2026
Tracked Since
Feb 18, 2026