CVE-2026-53666

CVE-2026-53666 affects React Router versions 6.4.0 through 7.17.0 where attacker-supplied input could overwrite parts of errors captured during SSR, enabling arbitrary constructor execution on the client and triggering outbound network requests. This requires specific, unlikely application-layer ...

CVE-2026-53666 React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on...

CVE-2026-53666 React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration

React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on...

CVE-2026-53666

React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on...

Open Redirect

React Router is vulnerable to Open Redirect. The vulnerability is due to improper handling of backslashes in and useNavigate, allowing attackers to bypass redirect validation and redirect users to attacker-controlled websites...

Denial Of Service

React Router is vulnerable to Denial Of Service. The vulnerability is due to insufficient protection of the manifest endpoint, where unauthenticated targeted requests can generate excessive server load, allowing attackers to degrade application performance and slow response times...

MAL-2026-11059 Malicious code in pp-react-ui5 (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware 6f33e8ad4e8e4d1037b0532607e4ddc2a7b9738ce59388d7258dbcc285ac900d Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

Malicious code in pp-react-ui5 (npm)

--- -= Per source details. Do not edit below this line.=- Source: ghsa-malware 6f33e8ad4e8e4d1037b0532607e4ddc2a7b9738ce59388d7258dbcc285ac900d Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be...

NPM: react-server-dom: Denial of Service in Server Functions

NPM: react-server-dom: Denial of Service in Server Functions vulnerability discovered by ? in WordPress Npm react-server-dom-turbopack versions = 19.0.0, 19.0.8...

react-server-dom: Denial of Service in Server Functions

Impact A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to out-of-memory exceptions or excessive CPU usage. We recommend updating immediately. The vulnerability exists in versions 19.0.0 through 19.0.7,...

NPM: react-server-dom: Denial of Service in Server Functions

NPM: react-server-dom: Denial of Service in Server Functions vulnerability discovered by ? in WordPress Npm react-server-dom-webpack versions = 19.0.0, 19.0.8...

EUVD-2026-46307

react-server-dom: Denial of Service in Server Functions...

NPM: react-server-dom: Denial of Service in Server Functions

NPM: react-server-dom: Denial of Service in Server Functions vulnerability discovered by ? in WordPress Npm react-server-dom-parcel versions = 19.1.0, 19.1.9...

NPM: React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response

NPM: React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response vulnerability discovered by ? in WordPress Npm react-router versions = 7.12.0, 8.3.0...

GHSA-QWWW-VCR4-C8H2 React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response

This is a follow up to CVE-2026-22030 to address related CSRF flows in unstable RSC code paths. !NOTE This only affects your application if you are using the unstable RSC APIs...

React Router: Unauthenticated Denial of Service via Inefficient Route Matching

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78 that covers additional reported scenarios in which the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response...

Inefficient Algorithmic Complexity

Overview Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through inefficient route matching in the manifest endpoint. An attacker can cause excessive server load and degrade response times by sending unauthenticated targeted requests. Note: This is only...

GHSA-CHX6-HX7R-MCP5 React Router: Unauthenticated Denial of Service via Inefficient Route Matching

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78 that covers additional reported scenarios in which the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response...

NPM: React Router: Unauthenticated Denial of Service via Inefficient Route Matching

NPM: React Router: Unauthenticated Denial of Service via Inefficient Route Matching vulnerability discovered by ? in WordPress Npm react-router versions = 7.0.0, 7.18.0...

EUVD-2025-210506

Cal.com calcom/cal.diy before 5.9.9 is vulnerable to unauthenticated remote code execution because it bundles a version of Next.js whose React Server Components RSC request handling deserializes attacker-controlled input. A remote attacker can send a crafted RSC request to the server and cause...