PT-2026-46087 · Npm · React Router

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

OSV

CVSS v3.1

8.0

High

Base vector

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

When using React Router v7's unstable RSC APIs, there exists a potential client-side XSS issue in the RSC redirect handling if redirects are coming from untrusted sources

[!NOTE] This only impacts your application if you are using the unstable RSC APIs in React Router.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

GHSA-8646-J5J9-6R62

Affected Products

React Router

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-33245 · Security Note
• https://osv.dev/vulnerability/GHSA-8646-j5j9-6r62 · Vendor Advisory
• https://github.com/remix-run/react-router · Note
• https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62 · Note