CVE-2026-33244 — React Router has stored XSS via unescaped Location header in prerendered redirect HTML

CVE-2026-33244

React Router has stored XSS via unescaped Location header in prerendered redirect HTML PUBLISHED

Description (CNA)

React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP `Location` header value can permit Cross-Site Scripting (XSS) in the statically generated HTML files if the redirect location comes from an untrusted source. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.13.2.

Affected (CNA)

Vendor / product	Versions
remix-run / react-router	affected >= 7.5.1, < 7.13.2

CWE

CWE-79

References

https://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.