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CVE-2026-34387— Fleet vulnerable to OS command injection via crafted software package metadata in uninstall scripts

Quick assessment

Affected
fleetdm fleet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fleet是Fleet Device Management开源的一个设备管理平台，支持多种操作系统和设备，帮助 IT 和安全团队进行设备管理、漏洞报告、MDM 等操作。 Fleet 4.81.1之前版本存在操作系统命令注入漏洞，该漏洞源于软件安装程序管道存在命令注入，可能导致在受管主机上以root或SYSTEM权限执行任意代码。

AI Predicted 9.8 Difficulty: Easy EPSS 1.28% · P68

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34387

Vulnerability Information
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Vulnerability Title
Fleet vulnerable to OS command injection via crafted software package metadata in uninstall scripts
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Fleet 操作系统命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fleet是Fleet Device Management开源的一个设备管理平台，支持多种操作系统和设备，帮助 IT 和安全团队进行设备管理、漏洞报告、MDM 等操作。 Fleet 4.81.1之前版本存在操作系统命令注入漏洞，该漏洞源于软件安装程序管道存在命令注入，可能导致在受管主机上以root或SYSTEM权限执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fleetdm fleet < 4.81.1 -

II. Public POCs for CVE-2026-34387

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III. Intelligence Information for CVE-2026-34387

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Vendor Advisories for CVE-2026-34387 (1)

Same Patch Batch · fleetdm · 2026-03-27 · 9 CVEs total

CVE-2026-26061 Fleet's unbounded request body read allows remote Denial of Service
CVE-2026-26060 Fleet: Password reset tokens remain valid after password change for 24 hours
CVE-2026-29180 Fleet's team maintainer can transfer hosts from any team via missing source team authoriza
CVE-2026-34386 Fleet vulnerable to SQL injection in MDM bootstrap package by authenticated team or globa
CVE-2026-34385 Fleet's Apple MDM profile delivery has second-order SQL injection that can compromise the
CVE-2026-34388 Fleet vulnerable to Denial of Service via unhandled gRPC log type in launcher endpoint
CVE-2026-34391 Fleet Vulnerable to Windows MDM cross-device command disclosure
CVE-2026-34389 Fleet's user account creation via invite does not enforce invited email address

IV. Related Vulnerabilities

Same product: fleet
Same vendor: fleetdm
Same weakness: CWE-78

V. Comments for CVE-2026-34387

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