# CVE-2026-39862: Shopify Tophat remote code execution via command injection

Source: https://junglewise.ai/threats/cve-2026-39862-shopify-tophat-remote-code-execution-via-command-injection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-24  
License: CC BY 4.0 with a link back

CVE-2026-39862 · Severity: high · CVSS 8.8 · Published 2026-04-08

Tophat, a mobile application testing tool used by developers, is vulnerable to a flaw that allows attackers to take control of a developer's macOS workstation. By tricking a user into clicking a specially crafted link, an attacker can execute malicious commands with the same permissions as the logged-in user. This could lead to the theft of source code, credentials, or full system compromise.

Vendors: [Shopify](https://junglewise.ai/threats/vendors/shopify).

## Quick answers

**Is CVE-2026-39862 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-39862 being exploited in the wild.

**How severe is CVE-2026-39862?** High severity, with a CVSS score of 8.8, published 8 April 2026.

**Which products and versions are affected?** Shopify Tophat < 2.5.1.

**Is there a fix for CVE-2026-39862?** A patch was published on 2026-03-30: Fix merged in pull request #139 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-39862 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-39862?** Check whether you run Shopify Tophat at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A command injection vulnerability (CWE-78) exists in Shopify Tophat prior to version 2.5.1. The application fails to sanitize the 'arguments' query parameter when parsing 'tophat://' or 'http://localhost:29070' URLs. This unsanitized input is passed directly to '/bin/bash -c' for execution. An attacker can exploit this by crafting a malicious URL that, when opened by a developer with Tophat installed, executes arbitrary shell commands with the user's privileges. For previously trusted build hosts, the execution may occur without a confirmation dialog. The issue is resolved in version 2.5.1 by implementing shell escaping for arguments and an allowlist for permitted characters.

## Affected products

- Shopify Tophat < 2.5.1

## Timeline

- 2026-03-30: patched: Fix merged in pull request #139
- 2026-04-08: disclosed: Vendor advisory published
- 2026-04-08: advisory: NVD published CVE-2026-39862

## References

- [https://github.com/Shopify/tophat/pull/139](https://github.com/Shopify/tophat/pull/139)
- [https://github.com/Shopify/tophat/security/advisories/GHSA-8x8g-6rv5-mgg2](https://github.com/Shopify/tophat/security/advisories/GHSA-8x8g-6rv5-mgg2)