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CVE-2026-40077— Beszel has an IDOR in hub API endpoints that read system ID from URL parameter

Quick assessment

Affected
henrygd beszel
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.

Beszel是hank个人开发者的一个轻量级服务器监控中心。 Beszel 0.18.7之前版本存在安全漏洞，该漏洞源于某些API端点未验证用户对系统ID的访问权限，可能导致经过身份验证的用户访问任意系统。

CVSS 3.5 · Low EPSS 0.28% · P19
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I. Basic Information for CVE-2026-40077

Vulnerability Information
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Vulnerability Title
Beszel has an IDOR in hub API endpoints that read system ID from URL parameter
Source: CVE Program / CVE List V5
Vulnerability Description
Beszel is a server monitoring platform. Prior to 0.18.7, some API endpoints in the Beszel hub accept a user-supplied system ID and proceed without further checks that the user should have access to that system. As a result, any authenticated user can access these routes for any system if they know the system's ID. System IDs are random 15 character alphanumeric strings, and are not exposed to all users. However, it is theoretically possible for an authenticated user to enumerate a valid system ID via web API. To use the containers endpoints, the user would also need to enumerate a container ID, which is 12 digit hexadecimal string. This vulnerability is fixed in 0.18.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
Beszel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Beszel是hank个人开发者的一个轻量级服务器监控中心。 Beszel 0.18.7之前版本存在安全漏洞，该漏洞源于某些API端点未验证用户对系统ID的访问权限，可能导致经过身份验证的用户访问任意系统。
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
henrygd beszel < 0.18.7 -

II. Public POCs for CVE-2026-40077

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III. Intelligence Information for CVE-2026-40077

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Vendor Advisories for CVE-2026-40077 (1)

IV. Related Vulnerabilities

Same product: beszel
Same vendor: henrygd
Same weakness: CWE-184

V. Comments for CVE-2026-40077

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