CVE-2026-39862: Tophat is a mobile applications testing harness

Q: How do I fix CVE-2026-39862?

tophat: upgrade to 2.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-39862 being exploited?

CVE-2026-39862 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-39862 affect?

CVE-2026-39862 affects tophat. Severity is high (CVSS 8.8). 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 /

This month

HIGH 8.8UPGRADE

CVE-2026-39862 is a high-severity flaw (CVSS 8.8) affecting tophat. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 confirmati

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-04-08
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: shopify

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 20:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

shopify tophat UPGRADE

Affected: < 2.5.1

Fixed in: 2.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy tophat || rpm -q tophat || tophat --version

2. UPGRADE to 2.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade tophat

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade tophat

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39862?

tophat: upgrade to 2.5.1. Exact commands for each OS are on this page.

Is CVE-2026-39862 being exploited?

CVE-2026-39862 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39862 affect?

CVE-2026-39862 affects tophat. Severity is high (CVSS 8.8). 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 /

How urgent is CVE-2026-39862?

Priority 42/100. High severity

Software pages

macOS vulnerabilities · Shopify vulnerabilities

References

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