VULNERABILITY INTELLIGENCE

CVE-2026-42211

CVSS score8.1 HIGH
EPSS probability0.42%
CISA KEVNot currently listed
Published2026-06-02
Last modified2026-07-21
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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 vulnerability, which can then be leveraged in a 2-step attack where the second step triggers unauthorized RCE on the remote server. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.14.2.

Weakness classification

  • security-advisories@github.com: CWE-502

Primary references