React Router: Potential CSRF via PUT/PATCH/DELETE document requests
Certain CSRF checks in React Router v7 Framework Mode were insufficient and run on POST requests, but were bypassed on PUT/PATCH/DELETE requests. This is a low severity vulnerability because modern browser protections (CORS preflight, SameSite cookies) already block the cross-origin attack vectors that this missing CSRF check would otherwise gate.
[!NOTE] This does not impact your React Router application if you are using Declarative Mode (
<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>).
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | react-router | >= 7.12.0, < 7.15.1 | 7.15.1 |
| npm package | @remix-run/server-runtime | >= 2.17.3, < 2.17.5 | 2.17.5 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N- Weakness (CWE)
CWE-352- Platform
- npm
- Package
react-router, @remix-run/server-runtime- Disclosed
- 15.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-84g9-w2xq-vcv6 - 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
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React Router: Potential CSRF via PUT/PATCH/DELETE document requests this entry
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