CVE-2026-34387 Details
Description
Fleet is open source device management software. Prior to 4.81.1, a command injection vulnerability in Fleet's software installer pipeline allows an attacker to achieve arbitrary code execution as root (macOS/Linux) or SYSTEM (Windows) on managed hosts when an uninstall is triggered for a crafted software package. Version 4.81.1 patches the issue.
A command injection vulnerability has been identified in Fleet's software installer pipeline, prior to version 4.81.1. This vulnerability allows an attacker to execute arbitrary code as root on macOS and Linux, or as SYSTEM on Windows, on managed hosts. The issue arises when an uninstall is triggered for a crafted software package. The vulnerability exploits the fact that metadata from uploaded packages is extracted and interpolated into automatically generated uninstall scripts without proper sanitization. An attacker could potentially embed a malicious payload in the package metadata, which would be executed during the uninstallation process.
Users are advised to upgrade to Fleet version 4.81.1 or later. Administrators should only upload software packages from trusted sources and review package metadata before uploading. If an immediate upgrade is not possible, manually inspect and edit the auto-generated uninstall scripts before deployment.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 27, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/fleetdm/fleet/security/advisories/GHSA-7rhw-5mpv-gp4h | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| fleetdm fleet | < 4.81.1 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 7, 2026 | Initial Analysis | [email protected] |
| Mar 27, 2026 | New CVE Received | [email protected] |