CVE-2026-34387

CRITICAL

Fleet vulnerable to OS command injection via crafted software package metadata in uninstall scripts

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.0128
EPSS Percentile 66.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-78
Status published
Products (1)
fleetdm/fleet < 4.81.1 (2 CPE variants)
Published Mar 27, 2026
Tracked Since Mar 29, 2026