PT-2026-46095 · Npm · React Router

Published 2026-06-03 · Updated 2026-06-03

OSV

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

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>).

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

GHSA-F22V-GFQF-P8F3

Affected Products

React Router

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-33244 · Security Note
• https://osv.dev/vulnerability/GHSA-f22v-gfqf-p8f3 · Vendor Advisory
• https://github.com/remix-run/react-router · Note
• https://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3 · Note