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CVE-2026-44423— ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data

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/sessions/:uid返回任何经过身份验证调用者的完整会话对象，未按租户范围限制，允许用户读取其他命名空间的会话记录。

CVSS 6.5 · Medium EPSS 0.35% · P27

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
shellhub-io shellhub < 0.24.2 affected
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I. Basic Information for CVE-2026-44423

Vulnerability Information
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Vulnerability Title
ShellHub: Cross-tenant IDOR in `GET /api/sessions/:uid` discloses SSH session data
Source: CVE Program / CVE List V5
Vulnerability Description
ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/sessions/:uid returns the full session object for any authenticated caller, without scoping by the caller's tenant. An authenticated user can read session records (SSH username, device UID, remote IP, terminal type, authenticated flag, timestamps) belonging to any other namespace. 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/sessions/:uid返回任何经过身份验证调用者的完整会话对象，未按租户范围限制，允许用户读取其他命名空间的会话记录。
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-2026-44423

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III. Intelligence Information for CVE-2026-44423

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Vendor Advisories for CVE-2026-44423 (1)

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

CVE-2026-44424 6.5 MEDIUM ShellHub: Cross-tenant IDOR in `GET /api/devices/:uid` discloses device data of any namesp
CVE-2026-44426 6.5 MEDIUM ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses members
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-2026-44423

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