CVE-2026-22808

MEDIUM

5.4

Description

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.

CVE Details

CVSS v3.1 Score5.4

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published1/21/2026

Last Modified2/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

fleetdm:fleet

Weaknesses (CWE)

CWE-79

References

https://github.com/fleetdm/fleet/security/advisories/GHSA-gfpw-jgvr-cw4j(security-advisories@github.com)

IOC Correlations

No correlations recorded

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