Vulnerability · Published Jun 22, 2026 · Assigned by GitHub_M
CVE-2026-53663React Router: `handleDocumentRequest` CSRF check covers `POST` only; PUT/PATCH/DELETE bypass
Low 3.1
In plain English
A low-severity cross-site request forgery in react-router from remix-run. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
React Router is a router for React. From 7.12.0 until 7.15.1, 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. This vulnerability is fixed in 7.15.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @remix-run/server-runtime | 2.17.5 | GHSA-84g9-w2xq-vcv6 |
| npm | react-router | 7.15.1 | GHSA-84g9-w2xq-vcv6 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| remix-run | react-router | >= 7.12.0, < 7.15.1 |
| @remix-run | server-runtime | >= 2.17.3, < 2.17.5 |
Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N