Cross-site Request Forgery (CSRF) Affecting @remix-run/server-runtime package, versions >=2.17.3 <2.17.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published16 Jun 2026
- disclosed15 Jun 2026
- creditIlsun Choi
Introduced: 15 Jun 2026
CVE-2026-53663 (opens in a new tab)How to fix?
Upgrade @remix-run/server-runtime to version 2.17.5 or higher.
Overview
@remix-run/server-runtime is a Server runtime for Remix
Affected versions of this package are vulnerable to Cross-site Request Forgery (CSRF) due to insufficient CSRF checks for PUT, PATCH, and DELETE document requests. An attacker can cause unauthorized state changes by tricking a user into submitting crafted requests from another origin.
Note:
Users that utilise Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>) are not affected by this issue.