CVE-2026-34387: Fleet is open source device management software. Prior to 4.81.1, a command injection vulnerability in Fleet's…
CVE-2026-34387 · Severity: critical · CVSS 9.8 · Published 2026-03-27
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-34387 being exploited in the wild.
How severe is CVE-2026-34387?
Critical severity, with a CVSS score of 9.8, published 27 March 2026.
Which products and versions are affected?
Fleetdm Fleet. The advisory does not name versions.
Is there a fix for CVE-2026-34387?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-34387?
Check whether you run Fleetdm Fleet. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.