CVE-2026-126402
Received Received - Intake

Incorrect Authorization in Fleet User Administration API Allows Privilege Escalation

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
Fleet before 4.89.0 contains an incorrect authorization flaw in its user administration API that accepts user creation or modification when the caller administers any one of the assigned teams. Authenticated team administrators can grant users administrator roles on other teams, then deploy software and execute scripts on those teams' hosts.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-126402
EUVD
EUVD-2026-125163

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
fleet fleet to 4.89.0 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

Fleet before version 4.89.0 has an authorization flaw in its user administration API. Authenticated team administrators can create or modify users beyond their assigned teams by granting administrator roles to other teams. This allows them to deploy software and execute scripts on hosts belonging to those teams.

Impact Analysis

This vulnerability allows unauthorized users with limited admin rights to escalate privileges and gain control over other teams' hosts. Attackers could deploy malicious software or run unauthorized scripts, leading to data breaches, system compromise, or unauthorized access to sensitive information.

Compliance Impact

This vulnerability could lead to unauthorized access and data breaches, violating compliance requirements for GDPR (data protection) and HIPAA (health information security). It undermines access controls and audit trails, increasing the risk of regulatory penalties and legal consequences.

Mitigation Strategies

Upgrade Fleet to version 4.89.0 or later to address the authorization flaw in the user administration API.

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