CVE-2026-34077

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

Published: Jun 2, 2026Updated: Jul 22, 2026 Sources: CVE List NVDCWE-770

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

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Weaknesses

CWE-770

Affected Products

remix-run

oss-project

react-routerLibrary

OSS Libraries / web-framework

turbo-streamLibrary

OSS Libraries / web-framework

shopify

commercial·US

react-routerSaaS

Web & CMS Plugins / ecommerce-platform

turbo-stream

commercial

turbo streamMixed

Web & CMS Plugins / wordpress-plugin

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Impact

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References

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

github.com

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