CVE-2025-59057 React Router has XSS Vulnerability
Attackers can execute arbitrary JavaScript via SSR in React Router's meta APIs when using Framework Mode with untrusted content.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-59057?
CVE-2025-59057 is a high-severity cross-site scripting vulnerability in remix-run react-router, published on 10 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
React Router is a router for React. In @remix-run/react versions 1.15.0 through 2.17.0. and react-router versions 7.0.0 through 7.8.2, a XSS vulnerability exists in in React Router's meta()/<Meta> APIs in Framework Mode when generating script:ld+json tags which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the tag. There is no impact if the application is being used in Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been patched in @remix-run/react version 2.17.1 and react-router version 7.9.0.
Weakness: CWE-79
Which versions are affected by CVE-2025-59057?
4 open source packages ship an affected version, including @remix-run/react and react-router. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
@remix-run/react npm | From 1.15.0 | 2.17.1 |
@remix-run/react npm | From 1.15.0 | 2.17.1 |
react-router npm | From 7.0.0 | 7.9.0 |
react-router npm | From 7.0.0 | 7.9.0 |
Products include Shopify React-Router, Shopify Remix-Run\/React.
How do I fix CVE-2025-59057?
Upgrade @remix-run/react to 2.17.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-59057 being exploited?
There is no known exploitation of CVE-2025-59057 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in remix-run react-router
- CVE-2026-55685 React Router: Unauthenticated Denial of Service via Inefficient Route Matching
- CVE-2026-21884 React Router SSR XSS in ScrollRestoration
- CVE-2026-42211 React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE
- CVE-2026-33245 React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
- CVE-2026-22029 React Router vulnerable to XSS via Open Redirects
Sources
Also known as CLSA-2026-1775521864, CLSA-2026-1792161540, CLSA-2026-1792279964, GHSA-3cgp-3xvw-98x8.