# CVE-2026-34387: Fleet is open source device management software. Prior to 4.81.1, a command injection vulnerability in Fleet's…

Source: https://junglewise.ai/threats/cve-2026-34387-fleet-is-open-source-device-management-software-prior-to-4-81-1-a  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-27  
License: CC BY 4.0 with a link back

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.

Technologies: [Fleetdm Fleet](https://junglewise.ai/threats/technologies/fleetdm-fleet). Vendors: [Fleetdm](https://junglewise.ai/threats/vendors/fleetdm).

## Quick answers

**Is CVE-2026-34387 exploited in the wild?** 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.

## Affected products

- Fleetdm Fleet

## Related threats

- [Fleet is open source device management software. Prior to 4.81.1, a vulnerability in Fleet's Windows MDM command…](https://junglewise.ai/threats/cve-2026-34391-fleet-is-open-source-device-management-software-prior-to-4-81-1-a)
- [GO-2026-4912 - Fleet's user account creation via invite does not enforce invited email address in github.com/fleetdm/fleet](https://junglewise.ai/threats/cve-2026-34389-fleet-s-user-account-creation-via-invite-does-not-enforce-invited)
- [GO-2026-4915 - Fleet vulnerable to Denial of Service via unhandled gRPC log type in launcher endpoint in github.com/fleetdm/fleet](https://junglewise.ai/threats/cve-2026-34388-fleet-vulnerable-to-denial-of-service-via-unhandled-grpc-log-type)
- [Fleet vulnerable to SQL Injection in MDM bootstrap package by authenticated team or global admin](https://junglewise.ai/threats/cve-2026-34386-fleet-vulnerable-to-sql-injection-in-mdm-bootstrap-package-by)
- [Fleet's Apple MDM profile delivery has second-order SQL Injection that can compromise the database](https://junglewise.ai/threats/cve-2026-34385-fleet-s-apple-mdm-profile-delivery-has-second-order-sql-injection)