CVE-2026-23518
Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment
Vexday Risk Score
28Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 9.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Ciclo de vida
21 ene 2026Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
Fleet is open source device management software. In versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3, a vulnerability in Fleet's Windows MDM enrollment flow could allow an attacker to submit forged authentication tokens that are not properly validated. Because JWT signatures were not verified, Fleet could accept attacker-controlled identity claims, enabling enrollment of unauthorized devices under arbitrary Azure AD user identities. Versions 4.78.3, 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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Productos afectados
fleetdm · fleet¿Quieres saber si tu infraestructura está expuesta a esto?
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