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

Patch now

CRITICAL 9.8EXPLOITEDREMOTEUPGRADE

CVE-2025-11953 is a critical-severity flaw (CVSS 9.8) affecting react native community cli, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Exploited in the wild (CISA KEV)
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	94.0% (top 1%)
CISA exploited list	Yes, fix due 2026-02-26
Weakness	CWE-78
Published	2025-11-03
Last modified	2026-06-17

Publisher (CNA): JFrog · Vendor: react-native-community

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-03 17:15 UTCPublished CVE record published
2026-02-05Exploited Added to the CISA Known Exploited Vulnerabilities list
2026-02-26Deadline CISA due date for US federal agencies to patch
2026-06-17 08:31 UTCUpdated Record last modified

react-native-community react native community cli UPGRADE

Affected: >= 19.0.0 and < 19.1.2 · 18.0.0 · 20.0.0 alpha0 · 20.0.0 alpha1 · 20.0.0 alpha2

Fixed in: 19.1.2

Safe to downgrade to: a release before 18.0.0

1. Check installed version

apt-cache policy react-native-community-cli || rpm -q react-native-community-cli || react-native-community-cli --version

2. UPGRADE to 19.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade react-native-community-cli

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade react-native-community-cli

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 18.0.0 (Debian / Ubuntu)

apt-cache madison react-native-community-cli sudo apt install react-native-community-cli=<VERSION_BEFORE_18.0.0> sudo apt-mark hold react-native-community-cli

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list react-native-community-cli sudo dnf downgrade react-native-community-cli-<VERSION_BEFORE_18.0.0> sudo dnf versionlock add react-native-community-cli

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

npm · @react-native-community/cli · FIXED · 20.0.0 · vulnerable: >= 20.0.0-alpha.0, < 20.0.0 · source

npm install @react-native-community/cli@">=20.0.0" npm ls @react-native-community/cli

npm · @react-native-community/cli-server-api · FIXED · 20.0.0 · vulnerable: >= 20.0.0-alpha.0, < 20.0.0 · source

npm install @react-native-community/cli-server-api@">=20.0.0" npm ls @react-native-community/cli-server-api

Fedora ELN · jgmenu · FIXED · 4.7.0-1.eln159 · FEDORA-2026-40fa69cb49 · source

sudo dnf upgrade --advisory=FEDORA-2026-40fa69cb49

Fedora 46 · trustedqsl · FIXED · 2.8.7-1.fc46 · FEDORA-2026-6b1bc90ebc · source

sudo dnf upgrade --advisory=FEDORA-2026-6b1bc90ebc

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: SaidBenaissa/cve-2025-11953-vulnerability-demo (4 stars)
GitHub PoC: Mr-In4inci3le/CVE-2025-11953-POC- (0 stars)
GitHub PoC: boroeurnprach/CVE-2025-11953-PoC (0 stars)
Write-up: www.vulncheck.com/blog/metro4shell_eitw
Nuclei scan template: React Native Community CLI - Unauthenticated OS Command Injection

Advisories and coverage

Research and news

VulnCheck Blog: Metro4Shell: Exploitation of React Native’s Metro Server in the Wild 2026-02-03

Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-11953?

react native community cli: upgrade to 19.1.2. Exact commands for each OS are on this page.

Is CVE-2025-11953 being exploited?

Yes. CVE-2025-11953 is on the CISA Known Exploited Vulnerabilities list, so treat it as patch-now.

What does CVE-2025-11953 affect?

CVE-2025-11953 affects react native community cli. Severity is critical (CVSS 9.8). 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 attacke

How urgent is CVE-2025-11953?

Priority 97/100. Critical severity; EPSS top 1%: very likely to be exploited; Exploited in the wild (CISA KEV); Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

React vulnerabilities · Windows vulnerabilities

References

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