CVE-2026-33245CWE-79

React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets

High · published June 2, 2026

CVSS v3.1
8.0
EPSS
0%
Percentile
13.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00233 · 13.3th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-06-02T17:14Z
EPSS history
Timeline
  • 02 JUN 17:14Z
    React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
    cvelistv5