CVE-2025-43864

CVE-2025-43864: React Router (versions 7.2.0–7.5.1) allows forcing SPA mode by a request header, which on SSR apps can trigger a page-corrupting error. If a cache stores the error response, this enables cache poisoning and degrades availability. Patch: upgrade to React Router 7.5.2 (or later).

CVE-2025-43864 React Router allows a DoS via cache poisoning by forcing SPA mode

React Router is a router for React. Starting in version 7.2.0 and prior to version 7.5.2, it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the...

react-router 安全漏洞

react-router is a declarative routing for React open-sourced by Remix. A security vulnerability exists in react-router versions prior to 7.2.0 through 7.5.2, which stems from potentially forcing an application to switch to SPA mode by adding a request header, which could lead to cache poisoning...

react-router 数据伪造问题漏洞

react-router is a declarative routing for React open-sourced by Remix. A data forgery issue vulnerability exists in versions of react-router prior to 7.5.2, which stems from the possible modification of pre-rendered data by adding a request header...

React Router allows pre-render data spoofing on React-Router framework mode

Summary After some research, it turns out that it's possible to modify pre-rendered data by adding a header to the request. This allows to completely spoof its contents and modify all the values ​​of the data object passed to the HTML. Latest versions are impacted. Details The vulnerable header i...

GHSA-CPJ6-FHP6-MR6J React Router allows pre-render data spoofing on React-Router framework mode

Summary After some research, it turns out that it's possible to modify pre-rendered data by adding a header to the request. This allows to completely spoof its contents and modify all the values ​​of the data object passed to the HTML. Latest versions are impacted. Details The vulnerable header i...

React Router allows a DoS via cache poisoning by forcing SPA mode

Summary After some research, it turns out that it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this...

GHSA-F46R-RW29-R322 React Router allows a DoS via cache poisoning by forcing SPA mode

Summary After some research, it turns out that it is possible to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an error that completely corrupts the page. If a cache system is in place, this...

PT-2025-17868

Name of the Vulnerable Software and Affected Versions React Router versions 7.0 through 7.5.1 Description The issue allows an attacker to modify pre-rendered data by adding a header to the request, potentially leading to various exploits, including stored XSS. This is possible due to a...

PT-2025-17867

Name of the Vulnerable Software and Affected Versions React Router versions 7.2.0 through 7.5.2 Description The issue allows an attacker to force an application to switch to SPA mode by adding a header to the request. If the application uses SSR and is forced to switch to SPA, this causes an erro...

CVE-2025-31137

React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an...

Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers

Impact We received a report about a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an incoming Request by putting a URL pathname in the port section of a URL...

GHSA-4Q56-CRQP-V477 Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers

Impact We received a report about a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an incoming Request by putting a URL pathname in the port section of a URL...

CVE-2025-31137

React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an...

CVE-2025-31137 Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers

React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an...

CVE-2025-31137

Summary: A Host/X-Forwarded-Host header manipulation vulnerability in Remix/React Router affects Remix 2 and React Router 7 users using the Express adapter. An attacker can spoof the incoming Request URL by placing a pathname in the URL’s port section of a header-hosted URL, potentially altering ...

CVE-2025-31137 Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers

React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an...

CVE-2025-31137 Remix and React Router allow URL manipulation via Host / X-Forwarded-Host headers

React Router is a multi-strategy router for React bridging the gap from React 18 to React 19. There is a vulnerability in Remix/React Router that affects all Remix 2 and React Router 7 consumers using the Express adapter. Basically, this vulnerability allows anyone to spoof the URL used in an...

PT-2025-14377 · Express +2 · Express +2

Name of the Vulnerable Software and Affected Versions: React Router versions 7.0.0 through 7.4.0 Remix versions 2.11.1 and later, prior to 2.16.3 Description: The issue allows anyone to spoof the URL used in an incoming Request by putting a URL pathname in the port section of a URL that is part o...

react-router 环境问题漏洞

react-router is a declarative routing for React open-sourced by Remix. An environmental issue vulnerability exists in react-router versions 7.0.0 through 7.4.0, which stems from an Express adapter for Remix or React Router that allows request URLs to be forged via URL pathnames...