Description

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.

INFO

Published Date :

2026-01-21T21:50:47.998Z

Last Modified :

2026-01-22T16:49:50.477Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-23518 vulnerability.

Vendors Products
Fleetdm
  • Fleet
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-23518.

URL Resource
https://github.com/fleetdm/fleet/commit/e225ef57912c8f4ac8977e24b5ebe1d9fd875257 cve-icon cve-icon
https://github.com/fleetdm/fleet/security/advisories/GHSA-63m5-974w-448v cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact