CVE-2026-34077 — React Router vulnerable to Denial of Service via reflected user input in single-fetch

CVE-2026-34077

React Router vulnerable to Denial of Service via reflected user input in single-fetch PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
remix-run / react-router	affected >= 7.0.0, < 7.14.0
remix-run / turbo-stream	affected < 3.0.0

CWE

CWE-770

References

https://github.com/remix-run/react-router/security/advisories/GHSA-rxv8-25v2-qmq8

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.