CVE-2026-24899
Fleet is open source device management software.
Published May 14, 2026 · updated Jun 17, 2026 · fleetdm fleet
Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the (audience) or (issuer) claims, any Microsoft-signed Azure AD access token containing the expected scopes can be used to authenticate to Fleet's MDM endpoints. If Windows MDM is enabled, an attacker with access to any Azure AD tenant can obtain a valid Microsoft-signed token and use it to enroll unauthorized devices and interact with Fleet's MDM management APIs. During device management, Fleet may expose sensitive enrollment secrets embedded in MDM command payloads, enabling further unauthorized access. Version 4.82.0 contains a patch. If an immediate upgrade is not possible, affected Fleet users should temporarily disable Windows MDM.
Code
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Timeline
Detection, updates, and resolution for this record.
May 14, 2026 · NIST NVD
Detected
Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the (audience) or (issuer) claims, any Microsoft-signed Azure AD access token containing the exp
Jun 17, 2026 · NIST NVD
Updated
Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoint but does not enforce the (audience) or (issuer) claims, any Microsoft-signed Azure AD access token containing the exp
Affected
- cpe fleetdm/fleetversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-24899
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-24899
Fleet is open source device management software. Prior to version 4.82.0, a vulnerability in Fleet's Windows MDM enrollment flow allows authentication tokens from any Azure AD tenant to be accepted. Because Fleet validates JWT signatures using Microsoft's multi-tenant JWKS endpoi
nvd.nist.gov