What’s Vulnerable › Vulnerabilities
CVE-2026-33245: React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
- Severity: medium (CVSS 4.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-02 · updated 2026-07-22
- Weakness: CWE-79
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.
Affected products
- remix-run react-router: from 7.7.0 before 7.13.2 — fixed in 7.13.2
How to fix
Upgrade to a fixed version: remix-run react-router 7.13.2. Check the vendor advisory for mitigations.
References
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