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CVE-2026-44426— ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check

Quick assessment

Affected
shellhub-io shellhub
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.

ShellHub是ShellHub开源的一个远程设备访问与管理平台。 ShellHub 0.24.2之前版本存在安全漏洞，该漏洞源于GET /api/namespaces/:tenant返回完整命名空间对象，包括成员列表、设置和设备计数，允许任何通过API密钥身份验证的调用者访问任何租户。

CVSS 6.5 · Medium EPSS 0.43% · P35

Affected Version Matrix 1

VendorProduct Version RangeStatus
shellhub-io shellhub < 0.24.2 affected
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I. Basic Information for CVE-2026-44426

Vulnerability Information
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Vulnerability Title
ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check
Source: CVE Program / CVE List V5
Vulnerability Description
ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/namespaces/:tenant returns the full namespace object — including the members list (user IDs, e-mails, roles), settings, and device counts — to any caller authenticated by an API Key, for any tenant, regardless of the API Key's own tenant scope. The handler conditionally skips the membership check when the user ID (X-ID) is absent, which is exactly the case for API Key authentication. This vulnerability is fixed in 0.24.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
ShellHub 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ShellHub是ShellHub开源的一个远程设备访问与管理平台。 ShellHub 0.24.2之前版本存在安全漏洞，该漏洞源于GET /api/namespaces/:tenant返回完整命名空间对象，包括成员列表、设置和设备计数，允许任何通过API密钥身份验证的调用者访问任何租户。
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
shellhub-io shellhub < 0.24.2 -

II. Public POCs for CVE-2026-44426

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III. Intelligence Information for CVE-2026-44426

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Vendor Advisories for CVE-2026-44426 (1)

Same Patch Batch · shellhub-io · 2026-05-13 · 4 CVEs total

CVE-2026-44423 6.5 MEDIUM ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data
CVE-2026-44424 6.5 MEDIUM ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namesp
CVE-2026-44425 5.4 MEDIUM ShellHub: Crash-DoS via field injection in filter and sort-by parameters

IV. Related Vulnerabilities

Same product: shellhub
Same vendor: shellhub-io
Same weakness: CWE-639

V. Comments for CVE-2026-44426

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