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...

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...

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-2026-40181

Summary: CVE-2026-40181 affects React Router. In versions 7.0.0–7.14.0 and 6.7.0–6.30.3, redirect() can produce an open redirect to an external domain when the URL starts with //, due to protocol-relative URL handling. Impact depends on application-side redirect validation and does not affect Dec...

CVE-2026-40181 React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation

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-2026-40181 React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation

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-2026-40181 React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation

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-2026-34077 React Router vulnerable to Denial of Service via reflected user input in single-fetch

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 vulnerable to Denial of Service via reflected user input in single-fetch

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 vulnerable to Denial of Service via reflected user input in single-fetch

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...

CVE-2026-34077

React Router upstream vulnerability CVE-2026-34077 affects versions 7.7.0–7.13.1 where, when using unstable React Server Components APIs, the RSC redirect handling can lead to a client-side XSS if redirects come from untrusted sources. The issue does not impact non-RSC applications. A fix is avai...

CVE-2026-33244

React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP Location header value can permit Cross-Site Scripting XSS in the statically generated HTML files if the redirect location comes from an...

CVE-2026-33245

CVE-2026-33245 affects React Router versions 7.7.0–7.13.1 when using unstable React Server Components (RSC) APIs. The issue is a client-side XSS vulnerability in the RSC redirect handling if redirects originate from untrusted sources. Applications not using the unstable RSC APIs are not affected....

CVE-2026-33245 React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets

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-2026-33245

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-2026-33245 React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets

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-2026-33245 React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets

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-2026-33244 React Router has stored XSS via unescaped Location header in prerendered redirect HTML

React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP Location header value can permit Cross-Site Scripting XSS in the statically generated HTML files if the redirect location comes from an...

CVE-2026-33244 React Router has stored XSS via unescaped Location header in prerendered redirect HTML

React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP Location header value can permit Cross-Site Scripting XSS in the statically generated HTML files if the redirect location comes from an...