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CVE-2026-53663— React Router: `handleDocumentRequest` CSRF check covers `POST` only; PUT/PATCH/DELETE bypass

Quick assessment

Affected
remix-run react-router
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

remix-run react-router是remix-run的路由管理库。 Remix React Router 7.12.0版本至7.15.1之前版本存在跨站请求伪造漏洞，该漏洞源于CSRF检查不足，仅对POST请求生效，导致PUT/PATCH/DELETE请求绕过。以下版本受到影响：7.12.0版本至7.15.1之前版本。

CVSS 3.1 · Low EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
@remix-run server-runtime >= 2.17.3, < 2.17.5 affected
remix-run react-router >= 7.12.0, < 7.15.1 affected
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I. Basic Information for CVE-2026-53663

Vulnerability Information
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Vulnerability Title
React Router: `handleDocumentRequest` CSRF check covers `POST` only; PUT/PATCH/DELETE bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Remix React Router 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
remix-run react-router是remix-run的路由管理库。 Remix React Router 7.12.0版本至7.15.1之前版本存在跨站请求伪造漏洞，该漏洞源于CSRF检查不足，仅对POST请求生效，导致PUT/PATCH/DELETE请求绕过。以下版本受到影响：7.12.0版本至7.15.1之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
remix-run react-router >= 7.12.0, < 7.15.1 -
@remix-run server-runtime >= 2.17.3, < 2.17.5 -

II. Public POCs for CVE-2026-53663

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III. Intelligence Information for CVE-2026-53663

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Vendor Advisories for CVE-2026-53663 (1)

IV. Related Vulnerabilities

Same product: react-router
Same vendor: remix-run
Same weakness: CWE-352

V. Comments for CVE-2026-53663

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