Open Redirect

Overview Affected versions of this package are vulnerable to Open Redirect via the redirect. An attacker can cause users to be redirected to malicious external sites or execute unauthorized scripts by enticing them to click crafted links. Remediation Upgrade react-router to version 7.13.0 or...

NPM: React Router: Open redirect leading to XSS

NPM: React Router: Open redirect leading to XSS vulnerability discovered by ? in WordPress Npm react-router versions = 7.9.6, = 7.12.0...

Open Redirect

Overview Affected versions of this package are vulnerable to Open Redirect via the redirect. An attacker can cause users to be redirected to malicious external sites or execute unauthorized scripts by enticing them to click crafted links. Remediation Upgrade org.webjars.npm:react-router to versio...

GHSA-JJMJ-JMHJ-QWJ2 React Router: Open redirect leading to XSS

Applications with open redirects could permit attacker crafted links to result in redirects to unexpected external location or XSS vectors...

React Router: Open redirect leading to XSS

Applications with open redirects could permit attacker crafted links to result in redirects to unexpected external location or XSS vectors...

NPM: React Router: RSCErrorHandler Missing Protocol Validation (XSS)

NPM: React Router: RSCErrorHandler Missing Protocol Validation XSS vulnerability discovered by ? in WordPress Npm react-router versions = 7.11.0, 7.18.0...

GHSA-H8FP-F39C-Q6MH React Router: RSCErrorHandler Missing Protocol Validation (XSS)

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62. React Router was alerted of a code path in the unstable RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect...

React Router: RSCErrorHandler Missing Protocol Validation (XSS)

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8646-j5j9-6r62. React Router was alerted of a code path in the unstable RSC error handling path in which redirects from untrusted sources could still result in an XSS vector via attacker-supplied redirect...

GHSA-337J-9HXR-RHXG React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic. This is only possible with very specific a...

NPM: React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

NPM: React Router: Arbitrary Constructor Injection via deserializeErrors in React Router SSR Hydration vulnerability discovered by ? in WordPress Npm react-router versions = 6.4.0, 7.18.0...

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Overview Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code 'Unsafe Reflection' in the deserializeErrors function during SSR hydration. An attacker can cause unexpected constructor execution on the client, potentially resulting in...

React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic. This is only possible with very specific a...

PT-2026-64215

Name of the Vulnerable Software and Affected Versions React Router versions 6.0.0 through 7.17.0 Description An open redirect issue exists where the use of backslashes in the component and the useNavigate function can lead to unexpected external navigations when attacker-supplied paths are...

PT-2026-64213

Name of the Vulnerable Software and Affected Versions React Router versions 7.11.0 through 7.17.0 Description The RSCErrorHandler lacks protocol validation, which allows redirects from untrusted sources. This can lead to a Cross-Site Scripting XSS vector—a technique where malicious scripts are...

react-router: @remix-run/server-runtime: React Router / Remix: Denial of Service via unbounded path expansion in __manifest endpoint

A flaw was found in React Router and @remix-run/server-runtime. A remote attacker can exploit this vulnerability by sending certain crafted requests to the manifest endpoint. This can lead to unbounded path expansion, consuming disproportionate server resources. The primary consequence is a denia...

react-router: React Router: Remote Code Execution via prototype pollution in Framework Mode

A flaw was found in React Router when operating in Framework Mode. A remote attacker could exploit an existing prototype pollution vulnerability within the application code. This could lead to unauthorized remote code execution RCE on the server through a two-step attack involving external...

react-router: React Router: Denial of Service via client-side Cross-Site Scripting in RSC redirect handling

A flaw was found in React Router versions 7.7.0 through 7.13.1. When using the unstable React Server Components RSC APIs, insufficient sanitization of redirect targets allows client-side cross-site scripting if redirects originate from untrusted sources. An attacker could inject script that...

react-router: React Router: Cross-Site Scripting vulnerability via untrusted React Server Component redirects

A flaw was found in React Router. This vulnerability, a type of Cross-Site Scripting XSS, affects applications utilizing React Router's unstable React Server Components RSC APIs. A remote attacker could exploit this by sending untrusted redirects, leading to the execution of malicious scripts in...

CVE-2026-42211

A flaw was found in React Router when operating in Framework Mode. A remote attacker could exploit an existing prototype pollution vulnerability within the application code. This could lead to unauthorized remote code execution RCE on the server through a two-step attack involving external...

Security Bulletin: Multiple Vulnerabilities in React Router bundled with IBM Fusion, IBM Fusion HCI and IBM Fusion Data Cataloging

Summary IBM Fusion, IBM Fusion HCI, and IBM Fusion Data Cataloging include the react-router library, which is affected by multiple vulnerabilities, including cross-site scripting XSS, cross-site request forgery CSRF, and open redirect vulnerabilities. CVE-2026-21884, CVE-2026-22029, CVE-2026-2203...