Vulnerability · Published Jul 6, 2026 · Assigned by VulDB

CVE-2026-14802react create-react-app react-dev-utils openBrowser.js startBrowserProcess os command injection

High 7.3

In plain English

A high-severity OS command injection in create-react-app from react. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.1% (higher than 82% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)2.1%top 18.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack tooling1Public PoC

Official description

A vulnerability was detected in react create-react-app up to 5.0.1 on macOS. This affects the function startBrowserProcess of the file openBrowser.js of the component react-dev-utils. Performing a manipulation results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	react-dev-utils	no fix listed	GHSA-g9g6-gvq9-j4vp

Affected products (as reported)

Vendor	Product	Versions
react	create-react-app	5.0.05.0.1

Weakness: CWE-78, CWE-77 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-376396 | react create-react-app react-dev-utils openBrowser.js startBrowserProcess os command injection vdb-entry, technical-description
VDB-376396 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-14802 | CVE Analysis and Report third-party-advisory
Submit #850857 | Node.js create-react-app 12.0.1 OS Command Injection third-party-advisory
https://github.com/react/create-react-app/issues/17269 exploit, issue-tracking
https://github.com/react/create-react-app/ product