CVE-2026-42342

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:shopify:react-router::::::node.js::*
	cpe:2.3:a:shopify:remix-run\/server-runtime::::::node.js::*

History

No history.

Information

Published : 2026-06-02 20:16

Updated : 2026-07-21 19:10

NVD link : CVE-2026-42342

Mitre link : CVE-2026-42342

CVE.ORG link : CVE-2026-42342

JSON object : View

Products Affected

shopify

react-router
remix-run\/server-runtime

CWE

CWE-400

Uncontrolled Resource Consumption

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