CVE-2025-43864

HIGH

React Router 7.2.0-7.5.1 - Cache Poisoning via Forced SPA Mode Switch

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-43864. PoCs published by pouriam23.

AI-analyzed exploit summary The repository appears to be a template for a React Router application with no actual exploit code or demonstration of CVE-2025-43864. The README and configuration files do not contain any offensive techniques or PoC for cache poisoning or DoS.

Description

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 page. If a cache system is in place, this allows the response containing the error to be cached, resulting in a cache poisoning that strongly impacts the availability of the application. This issue has been patched in version 7.5.2.

Exploits (1)

nomisec STUB 1 stars
by pouriam23 · poc
https://github.com/pouriam23/DoS-via-cache-poisoning-by-forcing-SPA-mode-CVE-2025-43864-

The repository appears to be a template for a React Router application with no actual exploit code or demonstration of CVE-2025-43864. The README and configuration files do not contain any offensive techniques or PoC for cache poisoning or DoS.

Classification
Stub 90%
Attack Type
Other
Complexity
Trivial
Reliability
Theoretical
Target: React Router (version unspecified)
No auth needed
Prerequisites: None identified
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Scores

CVSS v3 7.5
EPSS 0.0095
EPSS Percentile 76.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-755
Status published
Products (2)
npm/react-router 7.2.0 - 7.5.2npm
remix-run/react-router >= 7.2.0, < 7.5.2
Published Apr 25, 2025
Tracked Since Feb 18, 2026