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CVE-2026-22808

Fleet Windows MDM endpoint has a Cross-site Scripting vulnerability PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
fleetdm / fleetaffected >= 4.78.0, < 4.78.2; affected >= 4.77.0, < 4.77.1; affected >= 4.76.0, < 4.76.2; affected < 4.53.3

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.