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CVE-2026-23517— Fleet has an Access Control vulnerability in debug/pprof endpoints

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的一个开源的设备管理平台，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，免费且灵活。 Fleet存在安全漏洞，该漏洞源于访问控制不当，可能导致低权限用户访问敏感服务器内部信息并触发资源密集型操作。以下版本受到影响：4.78.3之前版本、4.77.1之前版本、4.76.2之前版本、4.75.2之前版本和4.53.3之前版本。

AI Predicted 6.5 Difficulty: Trivial EPSS 0.29% · P19
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I. Basic Information for CVE-2026-23517

Vulnerability Information
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Vulnerability Title
Fleet has an Access Control vulnerability in debug/pprof endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Fleet is open source device management software. A broken access control issue in versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3 allowed authenticated users to access debug and profiling endpoints regardless of role. As a result, low-privilege users could view internal server diagnostics and trigger resource-intensive profiling operations. Fleet’s debug/pprof endpoints are accessible to any authenticated user regardless of role, including the lowest-privilege “Observer” role. This allows low-privilege users to access sensitive server internals, including runtime profiling data and in-memory application state, and to trigger CPU-intensive profiling operations that could lead to denial of service. 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, users should put the debug/pprof endpoints behind an IP allowlist as a workaround.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Fleet 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fleet是Fleet的一个开源的设备管理平台，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，免费且灵活。 Fleet存在安全漏洞，该漏洞源于访问控制不当，可能导致低权限用户访问敏感服务器内部信息并触发资源密集型操作。以下版本受到影响：4.78.3之前版本、4.77.1之前版本、4.76.2之前版本、4.75.2之前版本和4.53.3之前版本。
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 >= 4.78.0, < 4.78.3 -

II. Public POCs for CVE-2026-23517

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III. Intelligence Information for CVE-2026-23517

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Same Patch Batch · fleetdm · 2026-01-21 · 3 CVEs total

CVE-2026-22808 Fleet Windows MDM endpoint has a Cross-site Scripting vulnerability
CVE-2026-23518 Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment

IV. Related Vulnerabilities

Same product: fleet
Same vendor: fleetdm
Same weakness: CWE-862

V. Comments for CVE-2026-23517

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