PT-2026-45828 · Remix Run · React Router+1

Published 2026-06-02 · Updated 2026-06-02 · CVE-2026-34077

Mitre

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-34077

Affected Products

React Router

Turbo-Stream

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-34077 · Security Note
• https://github.com/remix-run/react-router/security/advisories/GHSA-rxv8-25v2-qmq8 · Note