🛡️ CVE-2026-53663 — react-router
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
Details
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| @remix-run/server-runtime | — | — |
| react-router | — | — |
| unknown | — | — |
References
Similar Threats
- Unknown CLSA-2026-1775521863
- Unknown CLSA-2026-1775521864
- High CVE-2026-42342
- Medium CVE-2026-22030
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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