@react-native-community/cli has arbitrary OS command injection
CISA confirms exploitation of this vulnerability in real attacks. Prioritise checking whether your application is affected. CISA KEV · CC0 1.0
The Metro Development Server, which is opened by the React Native 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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @react-native-community/cli | >= 20.0.0-alpha.0, < 20.0.0, >= 19.0.0-alpha.0, < 19.1.2, >= 18.0.0, < 18.0.1 | 20.0.0, 19.1.2, 18.0.1 |
| npm package | @react-native-community/cli-server-api | >= 20.0.0-alpha.0, < 20.0.0, >= 19.0.0-alpha.0, < 19.1.2, >= 18.0.0, < 18.0.1 | 20.0.0, 19.1.2, 18.0.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-11953
- https://github.com/react-native-community/cli/issues/2733#issuecomment-3502424164
- https://github.com/react-native-community/cli/pull/1615
- https://github.com/react-native-community/cli/commit/15089907d1f1301b22c72d7f68846a2ef20df547
- https://github.com/react-native-community/cli/commit/5a792169d9883e0b0fb1ddf1ea46778f21510d18
- https://github.com/react-native-community/cli/commit/9e1fa8cc633e5dcf32244ffa60a871880be56722
- https://github.com/react-native-community/cli/commit/a8293dc29425f56249753507bc24d87b698d46e1
- https://github.com/react-native-community/cli
- https://github.com/react-native-community/cli/releases/tag/v20.0.0
- https://github.com/react-native-community/cli?tab=readme-ov-file#compatibility
- https://jfrog.com/blog/cve-2025-11953-critical-react-native-community-cli-vulnerability
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-11953
- https://www.vulncheck.com/blog/metro4shell_eitw
- https://x.com/SzymonRybczak/status/1986199665000566848
- https://x.com/szymonrybczak/status/1986199665000566848?s=46
- https://x.com/thymikee/status/1986770875954475375
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-78- Platform
- npm
- Package
@react-native-community/cli, @react-native-community/cli-server-api- Disclosed
- 03.11.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-399j-vxmf-hjvr - CC BY 4.0
Vulnerability history: @react-native-community/cli-server-api
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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