Executive brief
Fleet, a platform used to manage and monitor fleets of computers, contained a security flaw where users with low-level 'Observer' or 'Technician' permissions could view sensitive configuration data they should not have access to. This exposed information includes 'enroll secrets' used to add new devices to the network and other credentials like AWS keys or proxy passwords. An attacker with these credentials could potentially enroll unauthorized devices into the corporate environment or gain access to connected cloud services.
Technical details
An information disclosure vulnerability (CWE-200) exists in Fleet's target search endpoint (POST /api/latest/fleet/targets). While other team-facing endpoints correctly mask sensitive fields for low-privileged users, this specific endpoint failed to sanitize team enroll secrets and team agent options. An authenticated attacker with Observer, Observer+, or Technician roles (global or team-scoped) can retrieve unmasked secrets by performing a target search against an observer-runnable query. This allows for the enrollment of unauthorized hosts or the theft of credentials stored in agent options, such as AWS secret access keys. The issue is resolved in version 4.87.0.
Affected products
- Fleet Device Management (fleetdm) Fleet < 4.87.0
Timeline
- 2026-06-19: patched: Release v4.87.0 made available.
- 2026-08-11: disclosed: Initial advisory publication.