CVE-2021-21296

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.

CVSS 3.1

2.7CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L

EPSS

1.9% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-10-25)

CWE

CWE-400

Published

2021-02-10

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

Affected

• fleetdm:fleet

References

• https://github.com/fleetdm/fleet/commit/f68f4238e83b45b2164e4ed05df14af0f06eaf40
• https://github.com/fleetdm/fleet/security/advisories/GHSA-xwh8-9p3f-3x45
• https://www.npmjs.com/package/fleetctl
• https://github.com/fleetdm/fleet/commit/f68f4238e83b45b2164e4ed05df14af0f06eaf40
• https://github.com/fleetdm/fleet/security/advisories/GHSA-xwh8-9p3f-3x45

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