CVE-2025-11953: React Native Community CLI OS Command Injection Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2026-02-05. EPSS: 94% chance of exploitation in the next 30 days.

The Metro Development Server, which is opened by the React Native Community CLI, binds to external interfaces by default. The server exposes an endpoint that is vulnerable to OS command injection. This allows unauthenticated network attackers to send a POST request to the server and run arbitrary executables. On Windows, the attackers can also execute arbitrary shell commands with fully controlled arguments.

Affected products

• React Native Community React Native Community CLI: from 19.0.0, before 19.1.2 (fixed in 19.1.2); version 18.0.0 only; version 20.0.0 only

Published 2025-11-03. Last modified 2026-06-17.