CVE-2021-21296: Fleetdm Fleet

Low severity, CVSS 2.7. EPSS: 1.9% chance of exploitation in the next 30 days.

Fleet is an open source osquery manager. In Fleet before version 3.7.0 a malicious actor with a valid node key can send a badly formatted request that causes the Fleet server to exit, resulting in denial of service. This is possible only while a live query is currently ongoing. We believe the impact of this vulnerability to be low given the requirement that the actor has a valid node key. There is no information disclosure, privilege escalation, or code execution. The issue is fixed in Fleet 3.7.0.

Affected products

• Fleetdm Fleet: before 3.7.0 (fixed in 3.7.0)

Published 2021-02-10. Last modified 2026-10-06.