CVE-2026-25963

Received Received - Intake

Broken Authorization in Fleet Certificate Template Deletion API

Publication date: 2026-02-26

Last updated on: 2026-02-27

Assigner: GitHub, Inc.

Description

Fleet is open source device management software. In versions prior to 4.80.1, a broken authorization check in Fleet’s certificate template deletion API could allow a team administrator to delete certificate templates belonging to other teams within the same Fleet instance. Fleet supports certificate templates that are scoped to individual teams. In affected versions, the batch deletion endpoint validated authorization using a user-supplied team identifier but did not verify that the certificate template IDs being deleted actually belonged to that team. As a result, a team administrator could delete certificate templates associated with other teams, potentially disrupting certificate-based workflows such as device enrollment, Wi-Fi authentication, VPN access, or other certificate-dependent configurations for the affected teams. This issue does not allow privilege escalation, access to sensitive data, or compromise of Fleet’s control plane. Impact is limited to integrity and availability of certificate templates across teams. Version 4.80.1 patches the issue. If an immediate upgrade is not possible, administrators should restrict access to certificate template management to trusted users and avoid delegating team administrator permissions where not strictly required.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-02-26

Last Modified

2026-02-27

Generated

2026-07-06

AI Q&A

2026-02-26

EPSS Evaluated

2026-07-05

NVD

CVE-2026-25963

EUVD

EUVD-2026-8828

Affected Vendors & Products

Vendor	Product	Version / Range
fleetdm	fleet	to 4.80.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

Executive Summary

[{'type': 'paragraph', 'content': "CVE-2026-25963 is an authorization bypass vulnerability in Fleet's certificate template batch deletion API affecting versions prior to 4.80.1."}, {'type': 'paragraph', 'content': 'Fleet supports certificate templates scoped to individual teams, but the batch deletion endpoint only validates authorization based on a user-supplied team identifier without verifying that the certificate templates being deleted actually belong to that team.'}, {'type': 'paragraph', 'content': 'As a result, a team administrator can delete certificate templates belonging to other teams within the same Fleet instance.'}] [1]

Impact Analysis

This vulnerability can disrupt certificate-based workflows such as device enrollment, Wi-Fi authentication, VPN access, or other configurations that depend on certificates for the affected teams.

The impact is limited to the integrity and availability of certificate templates across teams.

It does not allow privilege escalation, access to sensitive data, or compromise Fleet’s control plane.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability immediately, administrators should restrict access to certificate template management to trusted users.

Avoid delegating team administrator permissions where not strictly required.

Upgrading Fleet to version 4.80.1 or later will patch the issue.

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