React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
There exists a potential DOS attack vector in React Router Framework Mode applications (as well as Remix v2.10.0 - 2.17.4). Certain requests can be crafted to consume disproportionate resources on the server, resulting in response time degredation and/or service unavailability for end users.
[!NOTE] This does not impact your React Router application if you are using Declarative Mode (
<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | react-router | >= 7.0.0, < 7.15.0 | 7.15.0 |
| npm package | @remix-run/server-runtime | >= 2.10.0, < 2.17.5 | 2.17.5 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-400- Platform
- npm
- Package
react-router, @remix-run/server-runtime- Disclosed
- 03.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-8x6r-g9mw-2r78 - CC BY 4.0
Vulnerability history: react-router
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 20
- First → latest
- 04.2025 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 11
- Medium 8
- Low 1
Disclosures per year
- 2025: 2
- 2026: 18
-
React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint this entry
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