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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-34077

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

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

remix-run react-router

  • >= 7.0.0, < 7.14.0affected

remix-run turbo-stream

  • < 3.0.0affected

References