PT-2026-46087

When using React Router v7's unstable RSC APIs, there exists a potential client-side XSS issue in the RSC redirect handling if redirects are coming from untrusted sources !NOTE This only impacts your application if you are using the unstable RSC APIs in React Router...

PT-2026-46085

When using React Router v7 in Framework Mode, there exists a combination of steps that could potentially allow unauthorized RCE through external requests. This first requires the application code to have an existing prototype pollution vulnerability. This can be leveraged into a 2-step attack in...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the serialization algorithm in the PrefetchPageLinks function. An attacker can cause a denial of service by supplying specially crafted user input that is reflected and processed...

Open Redirect

Overview Affected versions of this package are vulnerable to Open Redirect when certain URLs with path values starting with // are processed. An attacker can redirect users to external domains by supplying specially crafted protocol-relative URLs. Note: Users that utilise Declarative Mode are not...

Open Redirect

Overview Affected versions of this package are vulnerable to Open Redirect when certain URLs with path values starting with // are processed. An attacker can redirect users to external domains by supplying specially crafted protocol-relative URLs. Note: Users that utilise Declarative Mode are not...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the manifest endpoint. An attacker can exhaust server resources and cause service disruption by sending specially crafted requests that trigger unbounded path expansion. Note:...

Deserialization of Untrusted Data

Overview Affected versions of this package are vulnerable to Deserialization of Untrusted Data via the turbo-stream component in in Framework Mode. An attacker can execute arbitrary code on the remote server by sending specially crafted external requests that exploit an existing prototype polluti...

CVE-2026-42342

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the manifest endpoint, resulting in response...

CVE-2026-42211

React Router is a router for React. In versions 7.0.0 through 7.14.1, when using Framework Mode, a combination of steps could potentially allow unauthorized remote code execution RCE through external requests. This attack requires the application code to have an existing prototype pollution...

CVE-2026-40181

React Router is a router for React. In versions 7.0.0 through 7.14.0 and 6.7.0 through 6.30.3, certain URLs passed to the redirect function can trigger an open redirect to an external domain due to path values starting with // being reinterpreted as protocol-relative URLs. The level of impact...

CVE-2026-33245

React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components RSC APIs, there is a potential client-side Cross-Site Scripting XSS vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not...

CVE-2026-34077

React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components RSC APIs, there is a potential client-side Cross-Site Scripting XSS vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not...

Cross-site Scripting (XSS)

Overview @react-router/dev is a Dev tools and CLI for React Router Affected versions of this package are vulnerable to Cross-site Scripting XSS due to the improper neutralization of the HTTP Location header value in redirect HTML prerendering when using Framework Mode. An attacker can execute...

CVE-2026-42342 React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the manifest endpoint, resulting in response...

CVE-2026-42342

CVE-2026-42342 affects React Router and Remix Server Runtime: versions 7.0.0–7.14.x of react-router and 2.10.0–2.17.4 of @remix-run/server-runtime are vulnerable to DoS via unbounded path expansion on the __manifest endpoint, causing high resource usage and potential unavailability for Framework ...

CVE-2026-42342 React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the manifest endpoint, resulting in response...

CVE-2026-42342

React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the manifest endpoint, resulting in response...

CVE-2026-42211

React Router is a router for React. In versions 7.0.0 through 7.14.1, when using Framework Mode, a combination of steps could potentially allow unauthorized remote code execution RCE through external requests. This attack requires the application code to have an existing prototype pollution...

CVE-2026-42211

CVE-2026-42211 affects React Router versions 7.0.0–7.14.1 when used in Framework Mode. A combination of steps could enable a prototype pollution condition that an attacker could leverage in a two-step process to trigger unauthorized remote code execution on the remote server. The issue does not i...

CVE-2026-42211 React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE

React Router is a router for React. In versions 7.0.0 through 7.14.1, when using Framework Mode, a combination of steps could potentially allow unauthorized remote code execution RCE through external requests. This attack requires the application code to have an existing prototype pollution...