CVE-2026-34388

Fleet is open source device management software. Prior to 4.81.0, a denial-of-service vulnerability in Fleet's gRPC Launcher endpoint allows an authenticated host to crash the entire Fleet server process by sending an unexpected log type value. The server terminates immediately, disrupting all connected hosts, MDM enrollments, and API consumers. Version 4.81.0 patches the issue.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/fleetdm/fleet/security/advisories/GHSA-w254-4hp5-7cvv	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*

History

02 Apr 2026, 19:34

Type	Values Removed	Values Added
References	~~() https://github.com/fleetdm/fleet/security/advisories/GHSA-w254-4hp5-7cvv -~~	() https://github.com/fleetdm/fleet/security/advisories/GHSA-w254-4hp5-7cvv - Vendor Advisory
CPE		cpe:2.3:a:fleetdm:fleet::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
First Time		Fleetdm fleet Fleetdm

27 Mar 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-27 20:16

Updated : 2026-04-02 19:34

NVD link : CVE-2026-34388

Mitre link : CVE-2026-34388

CVE.ORG link : CVE-2026-34388

JSON object : View

Products Affected

fleetdm

fleet

CWE

CWE-703

Improper Check or Handling of Exceptional Conditions

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