CVE-2025-11953
React Native Community CLI OS Command Injection Vulnerability
React Native Community CLI
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.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 5 February 2026. US federal agencies were required to remediate it by 26 February 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 94%, which is higher than 99.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2025-11953 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2025-11953.
What does CVE-2025-11953 affect?
CVE-2025-11953 affects React Native Community CLI. 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.
How severe is CVE-2025-11953?
CVE-2025-11953 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 94%, higher than 99.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 26 February 2026.
How should organisations respond to CVE-2025-11953?
Apply the vendor patch for React Native Community CLI as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.