CVE-2026-14802Public exploitNetwork attack vector

Command execution via shell-expanded browser URL

Published Jul 6, 2026 · Updated Jul 6, 2026

OS command injection in Create React App 5.0.0 and 5.0.1 allows attackers to execute commands through a crafted development URL on macOS. The macOS path in react-dev-utils/openBrowser.js places encodeURI(url) inside a double-quoted osascript command run by execSync, leaving shell command-substitution characters active. Exploitation requires control of the URL and a running supported Chromium browser; successful injection executes with the developer's privileges.

CVSS severity7.3
High
EPSS probability2.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Create React App 5.0.0 and 5.0.1 allows attackers to execute commands through a crafted development URL on macOS. The macOS path in react-dev-utils/openBrowser.js places encodeURI(url) inside a double-quoted osascript command run by execSync, leaving shell command-substitution characters active. Exploitation requires control of the URL and a running supported Chromium browser; successful injection executes with the developer's privileges.

The record

CVE
CVE-2026-14802
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
Meta Platforms, Inc.
Product
Create React App
Classifications
CWE-78, CWE-77, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.0.0
  2. Affected versionversion=5.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Meta Platforms, Inc. · Create React Appversion=5.0.0; version=5.0.1

Published CVSS scores

7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDBCVSS: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
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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