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 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 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-2026-33244

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-2026-33244 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 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 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

CVE-2026-33244 affects React Router in versions 7.5.1–7.13.1 when using Framework Mode with pre-rendering enabled. The issue is improper neutralization of the HTTP Location header value, allowing Cross-Site Scripting (XSS) in statically generated HTML if the redirect target comes from an untruste...

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...

react-router cross-site scripting vulnerability

react-router is a declarative routing library for React, open-sourced by Remix. Versions of react-router from 7.5.1 to 7.13.1 have a cross-site scripting vulnerability. This vulnerability stems from improper handling of the HTTP Location header value in framework mode with pre-rendering enabled,...

PT-2026-45799

Name of the Vulnerable Software and Affected Versions React Router versions 7.5.1 through 7.13.1 Description When using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP Location header value can permit Cross-Site Scripting XSS—a vulnerability where malicious scripts...

PT-2026-45834

Name of the Vulnerable Software and Affected Versions React Router versions 7.0.0 through 7.14.1 Description When using Framework Mode, a combination of steps could allow unauthorized remote code execution RCE through external requests. This occurs because the vendored turbo-stream v2 can be abus...

CVE-2026-33244: Improper Neutralization of Input During Web Page Generation

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...

React-Router code issues and vulnerabilities

react-router is a declarative routing library for React, open-sourced by Remix. From version 7.0.0 to 7.14.1 of react-router, there are code-related vulnerabilities. These vulnerabilities stem from the possibility of unauthorized remote code execution through external requests under framework mod...

CVE-2026-42211: Deserialization of Untrusted Data

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...

Security Bulletin: XSS Vulnerability in React Router meta()/Meta APIs During SSR, affects watsonx.data

Summary React Router @remix-run/react 1.15.0–2.17.0, react-router 7.0.0–7.8.2 is vulnerable to XSS in meta/Meta APIs when generating script:ld+json tags in Framework Mode. Arbitrary JavaScript could execute during SSR if untrusted content is used. No impact occurs in Declarative Mode BrowserRoute...

react-router: @remix-run/router: React Router XSS Vulnerability

The cross site scripting flaw has been discovered in the npm react-router package. A XSS vulnerability exists in in React Router's 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...

react-router: @remix-run/react: React Router SSR XSS in ScrollRestoration

A cross site scripting flaw has been discovered in the npm react-router package. The cross site scripting XSS vulnerability exists in in React Router's API in Framework Mode when using the getKey/storageKey props during Server-Side Rendering which could allow arbitrary JavaScript execution during...