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CVE-2026-25963— Fleet: Authorization Bypass in certificate template batch deletion for team administrators

Quick assessment

Affected
fleetdm fleet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fleet是Fleet Device Management开源的一个设备管理平台，支持多种操作系统和设备，帮助 IT 和安全团队进行设备管理、漏洞报告、MDM 等操作。 Fleet 4.80.1之前版本存在安全漏洞，该漏洞源于证书模板删除API存在授权检查缺陷，可能导致团队管理员删除其他团队的证书模板，影响证书模板的完整性和可用性。

AI Predicted 5.3 Difficulty: Easy EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1556.001 · Domain Controller Authentication
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I. Basic Information for CVE-2026-25963

Vulnerability Information
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Vulnerability Title
Fleet: Authorization Bypass in certificate template batch deletion for team administrators
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Fleet 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fleet是Fleet Device Management开源的一个设备管理平台，支持多种操作系统和设备，帮助 IT 和安全团队进行设备管理、漏洞报告、MDM 等操作。 Fleet 4.80.1之前版本存在安全漏洞，该漏洞源于证书模板删除API存在授权检查缺陷，可能导致团队管理员删除其他团队的证书模板，影响证书模板的完整性和可用性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
fleetdm fleet < 4.80.1 -

II. Public POCs for CVE-2026-25963

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III. Intelligence Information for CVE-2026-25963

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Same Patch Batch · fleetdm · 2026-02-26 · 5 CVEs total

CVE-2026-26186 Fleet has a SQL injection via backtick escape in ORDER BY parameter
CVE-2026-24004 Fleet: Unauthenticated Android device disenrollment vulnerability via Pub/Sub endpoint
CVE-2026-27465 Fleet: Sensitive Google Calendar credentials disclosed to low-privileged users
CVE-2026-23999 Fleet: Device lock PIN can be predicted if lock time is known

IV. Related Vulnerabilities

Same product: fleet
Same vendor: fleetdm
Same weakness: CWE-863

V. Comments for CVE-2026-25963

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