CVE-2026-33245 HIGH

CVE-2026-33245: React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets

Vendor Remix-Run

Product react-router

Weakness CWE-79 · XSS

Published June 2, 2026

Last update June 3, 2026

View on NVD All CVEs

CVSS base score

8.0/10

Attack vector Network

Attack complexity High

Privileges required None

User interaction Required

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

What the vulnerability does

Description

React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.

Key dates

Disclosure timeline

June 2, 2026 CVE published

June 3, 2026 Record updated