CVE intelligence and bounded remediation

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

Critical CVSS 9.8 CISA KEV

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.

Severity
Critical
CVSS
9.8 (3.1)
Published
2025-11-03
CISA KEV
Known exploited
Ecosystem
windows/system
Weaknesses
CWE-78

Affected products

  • react-native-community / react_native_community_cli
  • react-native-community / react_native_community_cli / 18.0.0
  • react-native-community / react_native_community_cli / 20.0.0

Showing 3 representative product identities from 5 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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