---
title: "CVE-2026-101045: Fleet - Command Injection"
description: "Fleet-maintained app install and uninstall scripts for macOS generated before 2026-08-19 contain a command injection caused by incomplete escaping of Homebrew cask metadata in script interpolation, letting attackers achieve arbitrary root command execution on managed macOS hosts, exploit requires crafted metadata passing upstream and Fleet reviews."
url: https://panop.io/threat-heartbeat/CVE-2026-101045/
---

# CVE-2026-101045 Fleet - Command Injection

Fleet-maintained app install and uninstall scripts for macOS generated before 2026-08-19 contain a command injection caused by incomplete escaping of Homebrew cask metadata in script interpolation, letting attackers achieve arbitrary root command execution on managed macOS hosts, exploit requires crafted metadata passing upstream and Fleet reviews.

CVSS base score 8.0 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.75% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-101045)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Published

27 September 2026

Updated

15 October 2026

Weakness

[CWE-78](https://cwe.mitre.org/data/definitions/78.html)

## Vendor fix

Update to Fleet v4.92.0 or later where the fix is included

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-101045](https://nvd.nist.gov/vuln/detail/CVE-2026-101045)
- [https://www.vulncheck.com/advisories/fleet-homebrew-cask-os-command-injection-via-metadata](https://www.vulncheck.com/advisories/fleet-homebrew-cask-os-command-injection-via-metadata)
- [https://github.com/fleetdm/fleet/security/advisories/GHSA-fv3p-h7wv-2jgm](https://github.com/fleetdm/fleet/security/advisories/GHSA-fv3p-h7wv-2jgm)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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