CVE-2026-22029 React Router vulnerable to XSS via Open Redirects
Attackers can execute arbitrary JavaScript via unsafe open redirects in specific React Router modes when handling untrusted content.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-22029?
CVE-2026-22029 is a high-severity cross-site scripting vulnerability in @remix-run/router, published on 10 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
React Router is a router for React. In @remix-run/router version prior to 1.23.2 and react-router 7.0.0 through 7.11.0, React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe URLs causing unintended javascript execution on the client. This is only an issue if you are creating redirect paths from untrusted content or via an open redirect. There is no impact if Declarative Mode (<BrowserRouter>) is being used. This issue has been patched in @remix-run/router version 1.23.2 and react-router version 7.12.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-22029?
4 open source packages ship an affected version, including @remix-run/router and react-router. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
@remix-run/router npm | All versions | 1.23.2 |
@remix-run/router npm | All versions | 1.23.2 |
react-router npm | From 7.0.0 | 7.12.0 |
react-router npm | From 7.0.0 | 7.12.0 |
Linux distribution packages (1)
heroic-games-launcher openSUSE:Tumbleweed | All versions | 2.18.1-2.1 |
Products include Shopify React-Router, Shopify Remix-Run\/React.
How do I fix CVE-2026-22029?
Upgrade @remix-run/router to 1.23.2 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-2026-22029 being exploited?
There is no known exploitation of CVE-2026-22029 in the wild and no public exploit code.
Other vulnerabilities in @remix-run/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-2025-59057 React Router has XSS Vulnerability
Sources
Also known as CLSA-2026-1775608279, CLSA-2026-1781052757, CLSA-2026-1781052758, GHSA-2w69-qvjg-hvjx, ROOT-APP-NPM-CVE-2026-22029, openSUSE-SU-2026:10069-1.