CVE-2026-21884
CVE-2026-21884 · React Router SSR XSS in ScrollRestoration
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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.
CVSS 8.2 · Hoch · EPSS 0,5% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: node
Betroffene Produkte und Versionen
react-router
- Softwareversionen
- @remix-run/react < 2.17.3: Betroffen
- react-router >= 7.0.0, < 7.12.0: Betroffen
Keine Korrektur veröffentlicht
react-router npm
- Betroffene Versionsbereiche
- SEMVER: ≥ 7.0.0, < 7.12.0
Auf 7.12.0 aktualisieren
@remix-run/react npm
- Betroffene Versionsbereiche
- SEMVER: < 2.17.3
Auf 2.17.3 aktualisieren
Originalquellen
- https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7
- https://access.redhat.com/security/cve/CVE-2026-21884
- https://bugzilla.redhat.com/show_bug.cgi?id=2428421
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21884.json
- https://access.redhat.com/errata/RHSA-2026:3958
- https://access.redhat.com/errata/RHSA-2026:3960
- https://access.redhat.com/errata/RHSA-2026:3782
- https://access.redhat.com/errata/RHSA-2026:19712
- https://nvd.nist.gov/vuln/detail/CVE-2026-21884