CVE-2026-39862 MEDIUM

CVE-2026-39862: Tophat has a Command Injection Vulnerability When Accessing a Maliciously Crafted Tophat Link

Vendor Shopify
Product tophat
Weakness CWE-78
Published April 8, 2026
Last update April 9, 2026

CVSS base score

6.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

Tophat is a mobile applications testing harness. Prior to 2.5.1, Tophat is affected by remote code execution via crafted tophat:// or http://localhost:29070 URLs. The arguments query parameter flows unsanitized from URL parsing through to /bin/bash -c execution, allowing an attacker to execute arbitrary commands on a developer's macOS workstation. Any developer with Tophat installed is vulnerable. For previously trusted build hosts, no confirmation dialog appears. Attacker commands run with the user's permissions. This vulnerability is fixed in 2.5.1.

Key dates

02Disclosure timeline

April 8, 2026 CVE published
April 9, 2026 Record updated