CVE-2026-34077

HIGH

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0026
EPSS Percentile 16.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-770
Status published
Products (6)
npm/react-router 7.0.0 - 7.14.0npm
npm/turbo-stream 0 - 3.0.0npm
remix-run/react-router >= 7.0.0, < 7.14.0
remix-run/turbo-stream < 3.0.0
shopify/react-router 7.0.0 - 7.14.0
turbo-stream/turbo_stream < 3.0.0
Published Jun 02, 2026
Tracked Since Jun 03, 2026