How severe is CVE-2025-11953?

CVE-2025-11953 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2025-11953?

CVE-2025-11953 affects the following packages: @react-native-community/cli (npm), @react-native-community/cli (npm), @react-native-community/cli (npm), @react-native-community/cli-server-api (npm), @react-native-community/cli-server-api (npm), @react-native-community/cli-server-api (npm). Ecosystems affected: npm.

How do I fix CVE-2025-11953?

Update @react-native-community/cli to version 20.0.0 or later. Run your dependency manager's update command and verify no transitive dependencies pin the vulnerable version. Use O3 Security's SCA scanner to confirm the fix is applied across your entire dependency tree.

Is CVE-2025-11953 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-11953 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-11953?

CVE-2025-11953 has an EPSS (Exploit Prediction Scoring System) score of 14.0%, placing it in the 94th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2025-11953 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2025-11953 (React Native Community CLI OS Command Injection Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-02-05. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-02-26. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

When was CVE-2025-11953 published, and has it been updated?

CVE-2025-11953 was published on November 3, 2025 and was last updated on April 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2025-11953: @react-native-community/c… Command Injection (C…

EPSS Exploitation Probability

via FIRST.org ↗

14.0%probability of exploitation in next 30 days

Moderate Risk94th percentile-6.12%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Blast Radius

6 pkgs affected

📦@react-native-community/cli📦@react-native-community/cli📦@react-native-community/cli📦@react-native-community/cli-server-api📦@react-native-community/cli-server-api📦@react-native-community/cli-server-api

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.

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 Packages

6 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`@react-native-community/cli`	≥ 20.0.0-alpha.0&&< 20.0.0	20.0.0
📦npm	`@react-native-community/cli`	≥ 19.0.0-alpha.0&&< 19.1.2	19.1.2
📦npm	`@react-native-community/cli`	≥ 18.0.0&&< 18.0.1	18.0.1
📦npm	`@react-native-community/cli-server-api`	≥ 20.0.0-alpha.0&&< 20.0.0	20.0.0
📦npm	`@react-native-community/cli-server-api`	≥ 19.0.0-alpha.0&&< 19.1.2	19.1.2
📦npm	`@react-native-community/cli-server-api`	≥ 18.0.0&&< 18.0.1	18.0.1

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2025-11953 in your stack?

O3 detects CVE-2025-11953 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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