CVE-2026-34387
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductFleet
PublishedMar 27, 2026
First seenMar 27, 2026
Weakness typeCWE-78OS command injection
How to fix
Update
- fleetdm fleet4.81.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| fleetdm fleet | v < 4.81.1 | 4.81.1 |
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