🛡️ CVE-2026-53663 — react-router

🟢 CVSS 3.1 — Low ✅ No Known Exploit CWE-352 NVD
3.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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](https://reactrouter.com/start/modes#framework) (<BrowserRouter>) or [Data Mode](https://reactrouter.com/start/modes#data) (createBrowserRouter/<RouterProvider>).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity low, availability none.

Weakness class

CVE-2026-53663 is classified as CWE-352: Cross-Site Request Forgery (CSRF). A state-changing request is accepted without proof it was intended, so another site can trigger it using the victim's session.

Affected software

CVE-2026-53663 is recorded against 3 packages.

  • @remix-run/server-runtime
  • react-router
  • unknown

Timeline and source

Published on 15 June 2026 and last revised on 18 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
github.com (Package)

Details

Severity LOW
CVSS Score 3.1
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
CWE CWE-352
Public Exploit ✅ No
Source NVD
Published 2026-06-15
Updated 2026-08-12
Modified 2026-06-18
Fix URL N/A

Affected Packages

Software From version Fixed in
@remix-run/server-runtime
react-router
unknown

Similar Threats

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