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

> An OS command injection vulnerability in react-dev-utils allows remote attackers to execute arbitrary commands on macOS systems.

- **Severity:** Medium 6.9 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Jul 2026
- **Updated:** 6 Jul 2026
- **Also known as:** GHSA-g9g6-gvq9-j4vp

## What is CVE-2026-14802?

CVE-2026-14802 is a medium-severity command injection vulnerability in create-react-app, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-14802?

2 open source packages ship an affected version, including react-dev-utils.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `react-dev-utils` | npm | All versions to 5.0.1 | None |
| `react-dev-utils` | npm | All versions to 5.0.1 | None |

## How do I fix CVE-2026-14802?

No fix published yet.

## Is CVE-2026-14802 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14802 exists.

Public exploit code:

- https://github.com/IamDremig/CVE-2026-14802 (github_poc): https://github.com/IamDremig/CVE-2026-14802

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-14802 and fix it if it is affected.

What it is: CVE-2026-14802 is a medium-severity command injection vulnerability in create-react-app, published on 6 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14802 exists.

Affected packages and fixed versions:
- react-dev-utils (npm): affected all versions up to 5.0.1; no fix listed
- react-dev-utils (npm): affected all versions up to 5.0.1; no fix listed

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-14802/ (Markdown: https://insights.sbomify.com/CVE-2026-14802/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-14802
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-14802
- OSV: https://osv.dev/vulnerability/CVE-2026-14802

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-14802/
Summaries are generated and may contain mistakes; the official description above is the record.