CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-23518

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.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.0

EPSS Ranking 14.6%

CVSS Severity

CVSS v3 Score 9.8

References

Products affected by CVE-2026-23518

Fleetdm » Fleet » Version: N/A

cpe:2.3:a:fleetdm:fleet:-
Fleetdm » Fleet » Version: 1.0.0

cpe:2.3:a:fleetdm:fleet:1.0.0
Fleetdm » Fleet » Version: 1.0.1

cpe:2.3:a:fleetdm:fleet:1.0.1
Fleetdm » Fleet » Version: 1.0.2

cpe:2.3:a:fleetdm:fleet:1.0.2
Fleetdm » Fleet » Version: 1.0.3

cpe:2.3:a:fleetdm:fleet:1.0.3
Fleetdm » Fleet » Version: 1.0.4

cpe:2.3:a:fleetdm:fleet:1.0.4
Fleetdm » Fleet » Version: 1.0.5

cpe:2.3:a:fleetdm:fleet:1.0.5
Fleetdm » Fleet » Version: 1.0.6

cpe:2.3:a:fleetdm:fleet:1.0.6
Fleetdm » Fleet » Version: 1.0.7

cpe:2.3:a:fleetdm:fleet:1.0.7
Fleetdm » Fleet » Version: 1.0.8

cpe:2.3:a:fleetdm:fleet:1.0.8
Fleetdm » Fleet » Version: 1.0.9

cpe:2.3:a:fleetdm:fleet:1.0.9
Fleetdm » Fleet » Version: 2.0.0

cpe:2.3:a:fleetdm:fleet:2.0.0
Fleetdm » Fleet » Version: 2.0.1

cpe:2.3:a:fleetdm:fleet:2.0.1
Fleetdm » Fleet » Version: 2.0.2

cpe:2.3:a:fleetdm:fleet:2.0.2
Fleetdm » Fleet » Version: 2.1.0

cpe:2.3:a:fleetdm:fleet:2.1.0
Fleetdm » Fleet » Version: 2.1.1

cpe:2.3:a:fleetdm:fleet:2.1.1
Fleetdm » Fleet » Version: 2.1.2

cpe:2.3:a:fleetdm:fleet:2.1.2
Fleetdm » Fleet » Version: 2.2.0

cpe:2.3:a:fleetdm:fleet:2.2.0
Fleetdm » Fleet » Version: 2.3.0

cpe:2.3:a:fleetdm:fleet:2.3.0
Fleetdm » Fleet » Version: 2.4.0

cpe:2.3:a:fleetdm:fleet:2.4.0
Fleetdm » Fleet » Version: 2.5.0

cpe:2.3:a:fleetdm:fleet:2.5.0
Fleetdm » Fleet » Version: 2.6.0

cpe:2.3:a:fleetdm:fleet:2.6.0
Fleetdm » Fleet » Version: 3.0.0

cpe:2.3:a:fleetdm:fleet:3.0.0
Fleetdm » Fleet » Version: 3.1.0

cpe:2.3:a:fleetdm:fleet:3.1.0
Fleetdm » Fleet » Version: 3.10.0

cpe:2.3:a:fleetdm:fleet:3.10.0
Fleetdm » Fleet » Version: 3.10.1

cpe:2.3:a:fleetdm:fleet:3.10.1
Fleetdm » Fleet » Version: 3.11.0

cpe:2.3:a:fleetdm:fleet:3.11.0
Fleetdm » Fleet » Version: 3.12.0

cpe:2.3:a:fleetdm:fleet:3.12.0
Fleetdm » Fleet » Version: 3.13.0

cpe:2.3:a:fleetdm:fleet:3.13.0
Fleetdm » Fleet » Version: 3.2.0

cpe:2.3:a:fleetdm:fleet:3.2.0
Fleetdm » Fleet » Version: 3.3.0

cpe:2.3:a:fleetdm:fleet:3.3.0
Fleetdm » Fleet » Version: 3.4.0

cpe:2.3:a:fleetdm:fleet:3.4.0
Fleetdm » Fleet » Version: 3.5.0

cpe:2.3:a:fleetdm:fleet:3.5.0
Fleetdm » Fleet » Version: 3.5.1

cpe:2.3:a:fleetdm:fleet:3.5.1
Fleetdm » Fleet » Version: 3.6.0

cpe:2.3:a:fleetdm:fleet:3.6.0
Fleetdm » Fleet » Version: 3.7.0

cpe:2.3:a:fleetdm:fleet:3.7.0
Fleetdm » Fleet » Version: 3.7.1

cpe:2.3:a:fleetdm:fleet:3.7.1
Fleetdm » Fleet » Version: 3.7.2

cpe:2.3:a:fleetdm:fleet:3.7.2
Fleetdm » Fleet » Version: 3.7.3

cpe:2.3:a:fleetdm:fleet:3.7.3
Fleetdm » Fleet » Version: 3.7.4

cpe:2.3:a:fleetdm:fleet:3.7.4
Fleetdm » Fleet » Version: 3.8.0

cpe:2.3:a:fleetdm:fleet:3.8.0
Fleetdm » Fleet » Version: 3.9.0

cpe:2.3:a:fleetdm:fleet:3.9.0
Fleetdm » Fleet » Version: 4.0.0

cpe:2.3:a:fleetdm:fleet:4.0.0
Fleetdm » Fleet » Version: 4.0.1

cpe:2.3:a:fleetdm:fleet:4.0.1
Fleetdm » Fleet » Version: 4.1.0

cpe:2.3:a:fleetdm:fleet:4.1.0
Fleetdm » Fleet » Version: 4.10.0

cpe:2.3:a:fleetdm:fleet:4.10.0
Fleetdm » Fleet » Version: 4.11.0

cpe:2.3:a:fleetdm:fleet:4.11.0
Fleetdm » Fleet » Version: 4.12.0

cpe:2.3:a:fleetdm:fleet:4.12.0
Fleetdm » Fleet » Version: 4.13.0

cpe:2.3:a:fleetdm:fleet:4.13.0
Fleetdm » Fleet » Version: 4.13.1

cpe:2.3:a:fleetdm:fleet:4.13.1
Fleetdm » Fleet » Version: 4.13.2

cpe:2.3:a:fleetdm:fleet:4.13.2
Fleetdm » Fleet » Version: 4.14.0

cpe:2.3:a:fleetdm:fleet:4.14.0
Fleetdm » Fleet » Version: 4.15.0

cpe:2.3:a:fleetdm:fleet:4.15.0
Fleetdm » Fleet » Version: 4.16.0

cpe:2.3:a:fleetdm:fleet:4.16.0
Fleetdm » Fleet » Version: 4.17.0

cpe:2.3:a:fleetdm:fleet:4.17.0
Fleetdm » Fleet » Version: 4.17.1

cpe:2.3:a:fleetdm:fleet:4.17.1
Fleetdm » Fleet » Version: 4.18.0

cpe:2.3:a:fleetdm:fleet:4.18.0
Fleetdm » Fleet » Version: 4.19.0

cpe:2.3:a:fleetdm:fleet:4.19.0
Fleetdm » Fleet » Version: 4.19.1

cpe:2.3:a:fleetdm:fleet:4.19.1
Fleetdm » Fleet » Version: 4.2.0

cpe:2.3:a:fleetdm:fleet:4.2.0
Fleetdm » Fleet » Version: 4.2.1

cpe:2.3:a:fleetdm:fleet:4.2.1
Fleetdm » Fleet » Version: 4.2.2

cpe:2.3:a:fleetdm:fleet:4.2.2
Fleetdm » Fleet » Version: 4.2.3

cpe:2.3:a:fleetdm:fleet:4.2.3
Fleetdm » Fleet » Version: 4.2.4

cpe:2.3:a:fleetdm:fleet:4.2.4
Fleetdm » Fleet » Version: 4.20.0

cpe:2.3:a:fleetdm:fleet:4.20.0
Fleetdm » Fleet » Version: 4.20.1

cpe:2.3:a:fleetdm:fleet:4.20.1
Fleetdm » Fleet » Version: 4.21.0

cpe:2.3:a:fleetdm:fleet:4.21.0
Fleetdm » Fleet » Version: 4.22.0

cpe:2.3:a:fleetdm:fleet:4.22.0
Fleetdm » Fleet » Version: 4.22.1

cpe:2.3:a:fleetdm:fleet:4.22.1
Fleetdm » Fleet » Version: 4.23.0

cpe:2.3:a:fleetdm:fleet:4.23.0
Fleetdm » Fleet » Version: 4.24.0

cpe:2.3:a:fleetdm:fleet:4.24.0
Fleetdm » Fleet » Version: 4.24.1

cpe:2.3:a:fleetdm:fleet:4.24.1
Fleetdm » Fleet » Version: 4.25.0

cpe:2.3:a:fleetdm:fleet:4.25.0
Fleetdm » Fleet » Version: 4.26.0

cpe:2.3:a:fleetdm:fleet:4.26.0
Fleetdm » Fleet » Version: 4.27.0

cpe:2.3:a:fleetdm:fleet:4.27.0
Fleetdm » Fleet » Version: 4.27.1

cpe:2.3:a:fleetdm:fleet:4.27.1
Fleetdm » Fleet » Version: 4.28.0

cpe:2.3:a:fleetdm:fleet:4.28.0
Fleetdm » Fleet » Version: 4.28.1

cpe:2.3:a:fleetdm:fleet:4.28.1
Fleetdm » Fleet » Version: 4.29.0

cpe:2.3:a:fleetdm:fleet:4.29.0
Fleetdm » Fleet » Version: 4.29.1

cpe:2.3:a:fleetdm:fleet:4.29.1
Fleetdm » Fleet » Version: 4.3.0

cpe:2.3:a:fleetdm:fleet:4.3.0
Fleetdm » Fleet » Version: 4.3.1

cpe:2.3:a:fleetdm:fleet:4.3.1
Fleetdm » Fleet » Version: 4.3.2

cpe:2.3:a:fleetdm:fleet:4.3.2
Fleetdm » Fleet » Version: 4.30.0

cpe:2.3:a:fleetdm:fleet:4.30.0
Fleetdm » Fleet » Version: 4.30.1

cpe:2.3:a:fleetdm:fleet:4.30.1
Fleetdm » Fleet » Version: 4.31.0

cpe:2.3:a:fleetdm:fleet:4.31.0
Fleetdm » Fleet » Version: 4.31.1

cpe:2.3:a:fleetdm:fleet:4.31.1
Fleetdm » Fleet » Version: 4.32.0

cpe:2.3:a:fleetdm:fleet:4.32.0
Fleetdm » Fleet » Version: 4.33.0

cpe:2.3:a:fleetdm:fleet:4.33.0
Fleetdm » Fleet » Version: 4.33.1

cpe:2.3:a:fleetdm:fleet:4.33.1
Fleetdm » Fleet » Version: 4.34.0

cpe:2.3:a:fleetdm:fleet:4.34.0
Fleetdm » Fleet » Version: 4.34.1

cpe:2.3:a:fleetdm:fleet:4.34.1
Fleetdm » Fleet » Version: 4.35.0

cpe:2.3:a:fleetdm:fleet:4.35.0
Fleetdm » Fleet » Version: 4.35.1

cpe:2.3:a:fleetdm:fleet:4.35.1
Fleetdm » Fleet » Version: 4.35.2

cpe:2.3:a:fleetdm:fleet:4.35.2
Fleetdm » Fleet » Version: 4.36.0

cpe:2.3:a:fleetdm:fleet:4.36.0
Fleetdm » Fleet » Version: 4.37.0

cpe:2.3:a:fleetdm:fleet:4.37.0
Fleetdm » Fleet » Version: 4.38.0

cpe:2.3:a:fleetdm:fleet:4.38.0
Fleetdm » Fleet » Version: 4.38.1

cpe:2.3:a:fleetdm:fleet:4.38.1
Fleetdm » Fleet » Version: 4.39.0

cpe:2.3:a:fleetdm:fleet:4.39.0
Fleetdm » Fleet » Version: 4.4.0

cpe:2.3:a:fleetdm:fleet:4.4.0
Fleetdm » Fleet » Version: 4.4.1

cpe:2.3:a:fleetdm:fleet:4.4.1
Fleetdm » Fleet » Version: 4.4.2

cpe:2.3:a:fleetdm:fleet:4.4.2
Fleetdm » Fleet » Version: 4.4.3

cpe:2.3:a:fleetdm:fleet:4.4.3
Fleetdm » Fleet » Version: 4.40.0

cpe:2.3:a:fleetdm:fleet:4.40.0
Fleetdm » Fleet » Version: 4.41.0

cpe:2.3:a:fleetdm:fleet:4.41.0
Fleetdm » Fleet » Version: 4.41.1

cpe:2.3:a:fleetdm:fleet:4.41.1
Fleetdm » Fleet » Version: 4.42.0

cpe:2.3:a:fleetdm:fleet:4.42.0
Fleetdm » Fleet » Version: 4.43.0

cpe:2.3:a:fleetdm:fleet:4.43.0
Fleetdm » Fleet » Version: 4.43.1

cpe:2.3:a:fleetdm:fleet:4.43.1
Fleetdm » Fleet » Version: 4.43.2

cpe:2.3:a:fleetdm:fleet:4.43.2
Fleetdm » Fleet » Version: 4.43.3

cpe:2.3:a:fleetdm:fleet:4.43.3
Fleetdm » Fleet » Version: 4.44.0

cpe:2.3:a:fleetdm:fleet:4.44.0
Fleetdm » Fleet » Version: 4.44.1

cpe:2.3:a:fleetdm:fleet:4.44.1
Fleetdm » Fleet » Version: 4.45.0

cpe:2.3:a:fleetdm:fleet:4.45.0
Fleetdm » Fleet » Version: 4.45.1

cpe:2.3:a:fleetdm:fleet:4.45.1
Fleetdm » Fleet » Version: 4.46.0

cpe:2.3:a:fleetdm:fleet:4.46.0
Fleetdm » Fleet » Version: 4.46.1

cpe:2.3:a:fleetdm:fleet:4.46.1
Fleetdm » Fleet » Version: 4.46.2

cpe:2.3:a:fleetdm:fleet:4.46.2
Fleetdm » Fleet » Version: 4.47.0

cpe:2.3:a:fleetdm:fleet:4.47.0
Fleetdm » Fleet » Version: 4.47.1

cpe:2.3:a:fleetdm:fleet:4.47.1
Fleetdm » Fleet » Version: 4.47.2

cpe:2.3:a:fleetdm:fleet:4.47.2
Fleetdm » Fleet » Version: 4.47.3

cpe:2.3:a:fleetdm:fleet:4.47.3
Fleetdm » Fleet » Version: 4.48.0

cpe:2.3:a:fleetdm:fleet:4.48.0
Fleetdm » Fleet » Version: 4.48.1

cpe:2.3:a:fleetdm:fleet:4.48.1
Fleetdm » Fleet » Version: 4.48.2

cpe:2.3:a:fleetdm:fleet:4.48.2
Fleetdm » Fleet » Version: 4.48.3

cpe:2.3:a:fleetdm:fleet:4.48.3
Fleetdm » Fleet » Version: 4.49.0

cpe:2.3:a:fleetdm:fleet:4.49.0
Fleetdm » Fleet » Version: 4.49.1

cpe:2.3:a:fleetdm:fleet:4.49.1
Fleetdm » Fleet » Version: 4.49.2

cpe:2.3:a:fleetdm:fleet:4.49.2
Fleetdm » Fleet » Version: 4.49.3

cpe:2.3:a:fleetdm:fleet:4.49.3
Fleetdm » Fleet » Version: 4.49.4

cpe:2.3:a:fleetdm:fleet:4.49.4
Fleetdm » Fleet » Version: 4.5.0

cpe:2.3:a:fleetdm:fleet:4.5.0
Fleetdm » Fleet » Version: 4.5.1

cpe:2.3:a:fleetdm:fleet:4.5.1
Fleetdm » Fleet » Version: 4.50.0

cpe:2.3:a:fleetdm:fleet:4.50.0
Fleetdm » Fleet » Version: 4.50.1

cpe:2.3:a:fleetdm:fleet:4.50.1
Fleetdm » Fleet » Version: 4.50.2

cpe:2.3:a:fleetdm:fleet:4.50.2
Fleetdm » Fleet » Version: 4.51.0

cpe:2.3:a:fleetdm:fleet:4.51.0
Fleetdm » Fleet » Version: 4.51.1

cpe:2.3:a:fleetdm:fleet:4.51.1
Fleetdm » Fleet » Version: 4.52.0

cpe:2.3:a:fleetdm:fleet:4.52.0
Fleetdm » Fleet » Version: 4.53.0

cpe:2.3:a:fleetdm:fleet:4.53.0
Fleetdm » Fleet » Version: 4.53.1

cpe:2.3:a:fleetdm:fleet:4.53.1
Fleetdm » Fleet » Version: 4.53.2

cpe:2.3:a:fleetdm:fleet:4.53.2
Fleetdm » Fleet » Version: 4.6.0

cpe:2.3:a:fleetdm:fleet:4.6.0
Fleetdm » Fleet » Version: 4.6.1

cpe:2.3:a:fleetdm:fleet:4.6.1
Fleetdm » Fleet » Version: 4.6.2

cpe:2.3:a:fleetdm:fleet:4.6.2
Fleetdm » Fleet » Version: 4.7.0

cpe:2.3:a:fleetdm:fleet:4.7.0
Fleetdm » Fleet » Version: 4.75.0

cpe:2.3:a:fleetdm:fleet:4.75.0
Fleetdm » Fleet » Version: 4.75.1

cpe:2.3:a:fleetdm:fleet:4.75.1
Fleetdm » Fleet » Version: 4.76.0

cpe:2.3:a:fleetdm:fleet:4.76.0
Fleetdm » Fleet » Version: 4.76.1

cpe:2.3:a:fleetdm:fleet:4.76.1
Fleetdm » Fleet » Version: 4.77.0

cpe:2.3:a:fleetdm:fleet:4.77.0
Fleetdm » Fleet » Version: 4.78.0

cpe:2.3:a:fleetdm:fleet:4.78.0
Fleetdm » Fleet » Version: 4.78.1

cpe:2.3:a:fleetdm:fleet:4.78.1
Fleetdm » Fleet » Version: 4.78.2

cpe:2.3:a:fleetdm:fleet:4.78.2
Fleetdm » Fleet » Version: 4.8.0

cpe:2.3:a:fleetdm:fleet:4.8.0
Fleetdm » Fleet » Version: 4.9.0

cpe:2.3:a:fleetdm:fleet:4.9.0
Fleetdm » Fleet » Version: 4.9.1

cpe:2.3:a:fleetdm:fleet:4.9.1

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-23518

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