React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
This issue has been fixed in version 7.18.0.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Shopify React-Router
cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*
|
7.0.0
|
7.18.0
|
References 6
https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mc…
https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5
https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r…
https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78
https://github.com/remix-run/react-router/pull/15186
https://github.com/remix-run/react-router/pull/15186
https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ec…
https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929
https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180
https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180
https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0
https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0