Cloudanix VulnDB

CVE-2026-22808

Medium · 5.4

CVSS

5.4

EPSS

0.2%

Published

Jan 21, 2026

CISA due date

—

The record

fleetdm/fleet is open source device management software. Prior to versions 4.78.2, 4.77.1, 4.76.2, 4.75.2, and 4.53.3, if Windows MDM is enabled, an unauthenticated attacker can exploit this XSS vulnerability to steal a Fleet administrator's authentication token (FLEET::auth_token) from localStorage. This could allow unauthorized access to Fleet, including administrative access, visibility into device data, and modification of configuration. Versions 4.78.2, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 fix the issue. If an immediate upgrade is not possible, affected Fleet users should temporarily disable Windows MDM.

Affected packages

Ecosystem Package Introduced Fixed
Go github.com/fleetdm/fleet 4.75.0 4.75.2
Go github.com/fleetdm/fleet 4.76.0 4.76.2
Go github.com/fleetdm/fleet 4.77.0 4.77.1
Go github.com/fleetdm/fleet 4.78.0 4.78.2
Go github.com/fleetdm/fleet/v4 0 4.43.5-0.20260111020427-0e6c790803d1
Go github.com/fleetdm/fleet/v4 4.75.0 4.75.2
go github.com/fleetdm/fleet 4.75.0 4.75.2
go github.com/fleetdm/fleet 4.76.0 4.76.2
go github.com/fleetdm/fleet 4.77.0 4.77.1
go github.com/fleetdm/fleet 4.78.0 4.78.2
openSUSE:Leap 15.6 govulncheck-vulndb 0 0.0.20260205T172317-150000.1.146.1

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