CVE-2026-34387CWE-78

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

Medium · published March 27, 2026

CVSS v4.0
5.7
EPSS
2%
Percentile
79.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.7 · MEDIUM
Vector
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
EPSS
0.01850 · 79.0th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-03-27T18:31Z
EPSS history
Timeline
  • 27 MAR 18:31Z
    Fleet vulnerable to OS command injection via crafted software package metadata in uninstall scripts
    cvelistv5