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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-02-05
• EPSS: 94.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-11-03 · updated 2026-06-17
• Weakness: CWE-78

Description

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; 18.0.0, 20.0.0-alpha0, 20.0.0-alpha1, 20.0.0-alpha2 — fixed in 19.1.2

How to fix

Upgrade to a fixed version: React-Native-Community React Native Community Cli 19.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/react-native-community/cli/commit/15089907d1f1301b22c72d7f68846a2ef20df547
• https://jfrog.com/blog/cve-2025-11953-critical-react-native-community-cli-vulnerability
• https://x.com/SzymonRybczak/status/1986199665000566848
• https://x.com/thymikee/status/1986770875954475375
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-11953
• https://www.vulncheck.com/blog/metro4shell_eitw

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