CVE-2026-34387

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

CVSS 5.7 MEDIUMEPSS 1.3%CWE-78

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.7EPSS 1.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

fleetdm · fleet

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References

https://github.com/fleetdm/fleet/security/advisories/GHSA-7rhw-5mpv-gp4h