CVE-2026-21884: falha de alta gravidade em remix-run react-router
React Router SSR XSS in ScrollRestoration
Publicada em · Atualizada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 8.2epss 0.5%
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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Produtos afetados
remix-run · react-routerCVEs relacionadas — remix-run react-router
No mesmo produto, das mais perigosas para as menos.
CVE-2025-43864HIGHReact Router allows a DoS via cache poisoning by forcing SPA modeEPSS 20.5%CVE-2025-61686CRITICALReact Router has Path Traversal in File Session StorageEPSS 17.3%CVE-2025-31137HIGHRemix and React Router allow URL manipulation via Host / X-Forwarded-Host headersEPSS 1.2%CVE-2026-22029HIGHReact Router vulnerable to XSS via Open RedirectsEPSS 0.9%CVE-2025-43865HIGHReact Router allows pre-render data spoofing on React-Router framework modeEPSS 0.8%CVE-2026-55685HIGHReact Router: Unauthenticated Denial of Service via Inefficient Route MatchingEPSS 0.7%
Referências
https://access.redhat.com/errata/RHSA-2026:19712https://access.redhat.com/errata/RHSA-2026:3782https://access.redhat.com/errata/RHSA-2026:3958https://access.redhat.com/errata/RHSA-2026:3960https://access.redhat.com/security/cve/CVE-2026-21884https://bugzilla.redhat.com/show_bug.cgi?id=2428421https://github.com/remix-run/react-router/security/advisories/GHSA-8v8x-cx79-35w7https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21884.json