CVE-2026-33244Medium· 5.4▾ SunlitReact Router has stored XSS via unescaped Location header in prerendered redirect HTML
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.7 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
Last analysed / modified upstream
0.1%
When using React Router v7 Framework Mode with Pre-rendering enabled, an improper neutralization of the HTTP Location header value can permit Cross-Site Scripting (XSS) in statically generated HTML files if the redirect location comes from an untrusted source.
[!NOTE] This does not impact your React Router application if you are using Declarative Mode (
<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
react-router >= 7.5.1, < 7.13.2Upgrade to a patched release:
react-router 7.13.2Connected by shared product, vendor, weakness, or advisory.
CVE-2026-53667Medium· 6.9React Router: RSCErrorHandler Missing Protocol Validation (XSS)
CVE-2026-53668Medium· 6.9React Router: Open redirect leading to XSS
CVE-2026-21884High· 8.2React Router is a router for React
CVE-2025-59057High· 7.6React Router is a router for React
GHSA-qwww-vcr4-c8h2HighReact Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response
CVE-2026-53666Medium· 6.1React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration