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Fencer Intel
critical 9.8

CVE-2025-11953 kev in the critical feed json

Command injection in React Native Community CLI allows remote attackers to perform remote code execution by sending HTTP requests

published last yr. modified 6d ago also GHSA-399j-vxmf-hjvr , EUVD-2025-37505

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2026-02-05
epss
94.0%
EPSS 94.0% chance of exploitation in 30 days, percentile 99.8%
public exploits
0
none known

Summary

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.

Patch / fix

cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  • npm @react-native-community/cli 18.0.1, 19.1.2, 20.0.0
  • npm @react-native-community/cli-server-api 18.0.1, 19.1.2, 20.0.0
  • react-native-community react_native_community_cli 19.1.2

Is CVE-2025-11953 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-11953 updated cvss 8.1

@react-native-community/cli-server-api: Command injection in React Native CLI

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA SSVC: exploitation active
  4. CISA patch deadline

Known exploited

Added
9mo ago
Patch by
2026-02-26 (8mo ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor, product
React Native Community, CLI
CISA name
React Native Community CLI OS Command Injection Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
9mo ago

Exploit prediction

93.98% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • jfrog.com https://jfrog.com/blog/cve-2025-11953-critical-react-native-community-cli-vulnerability referenced PoC, tagged "exploit" by a source, unverified
  • vulncheck.com https://www.vulncheck.com/blog/metro4shell_eitw referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm @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 @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

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.