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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
NVD MITRE
EPSS Score
0.3%
Top 78.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
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
View detailed technique mapping

References

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

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