CVE-2026-53663

React Router: `handleDocumentRequest` CSRF check covers `POST` only; PUT/PATCH/DELETE bypass

State: Published
Severity: 3.1 Low
Published: Jun 22, 2026
Updated: Jun 22, 2026
Reserved: Jun 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N	GitHub_M

Weaknesses

CWE-352 Cross-Site Request Forgery (CSRF)

Affected Products

Product	Versions
react-routerremix-run	>= 7.12.0, < 7.15.1Affected
server-runtime@remix-run	>= 2.17.3, < 2.17.5Affected

References

https://github.com/remix-run/react-router/security/advisories/GHSA-84g9-w2xq-vcv6

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