Denial-of-service in Fleet

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Summary

CVECVE-2021-21296
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-02-10 20:15:15 UTC
Updated2026-10-06 14:18:40 UTC
DescriptionFleet 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.

Risk And Classification

Primary CVSS: v3.1 2.7 LOW from [email protected]

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

EPSS: 0.019410000 probability, percentile 0.794730000 (date 2026-10-06)

Problem Types: CWE-400 | NVD-CWE-Other | CWE-400 CWE-400 Uncontrolled Resource Consumption

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary2.7LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
3.1[email protected]Secondary2.7LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED2.7LOWCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
2.0[email protected]Primary4AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:S/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Fleetdm Fleet All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Fleetdm Fleet affected < 3.7.0 Not specified

References

ReferenceSourceLinkTags
Possible DoS by authorized nodes in live query write · Advisory · fleetdm/fleet · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Third Party Advisory
fleetctl af854a3a-2127-422b-91ae-364da2661108 www.npmjs.com Product, Third Party Advisory
Merge pull request from GHSA-xwh8-9p3f-3x45 · fleetdm/fleet@f68f423 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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