CVE-2026-33245

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

State: Published
Severity: 8.0 High
Published: Jun 2, 2026
Updated: Jun 3, 2026
Reserved: Mar 18, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.0 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
react-routerremix-run	>= 7.7.0, < 7.13.2Affected

References

https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62

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