Is Command Injection affected by CVE-2026-34387?

Organizations using Fleet should be aware of moderate risk from CVE-2026-34387, a OS command injection vulnerability rated CVSS 5.7. Exploitation could allow attackers to execute code or inject malicious input. Organizations should apply vendor updates when available and monitor for exploitation.

CVE-2026-34387

EUVD-2026-16758 MEDIUM

2026-03-27 GitHub_M

5.7

CVSS 4.0

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Scope

Lifecycle Timeline

EUVD ID Assigned

Mar 27, 2026 - 19:00 euvd

EUVD-2026-16758

Analysis Generated

Mar 27, 2026 - 19:00 vuln.today

CVE Published

Mar 27, 2026 - 18:31 nvd

MEDIUM 5.7

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.

Analysis

Fleet device management software versions prior to 4.81.1 are vulnerable to command injection in the software installer pipeline, enabling remote attackers with high privileges to achieve arbitrary code execution as root on macOS/Linux or SYSTEM on Windows when triggering uninstall operations on crafted software packages. The vulnerability requires high privileges and user interaction but delivers complete system compromise on affected managed hosts. …

Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.3

CVSS: +28

POC: 0

CVE-2026-34387 vulnerability details – vuln.today

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CVE-2026-34387

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CVE-2026-34387

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