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CVE-2026-79750— MCPHub authenticated horizontal IDOR: any non-admin user executes tools on other users' MCP servers (cross-tenant file read + SSRF)

Quick assessment

Affected
samanhappy mcphub
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.

MCPHub 是一个统一中心，用于集中管理和动态编排多个 MCP 服务器/API，支持通过不同的端点和灵活的路由策略进行组织。在 1.0.30 版本之前，MCPHub 将非管理员用户的访问范围限定为其拥有的服务器（在列表视图和配置编辑中强制实施所有权控制），但其工具执行 API 却未做此限制。任何经过身份验证的非管理员用户都可以在其他用户拥有的 MCP 服务器上调用工具——这些服务器在 中甚至对该用户不可见。由于已连接的 MCP 服务器具备实际功能（如文件系统访问、HTTP 抓取、携带所有者的密钥的云 API 等）

CVSS 7.7 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-79750

Vulnerability Information
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Vulnerability Title
MCPHub authenticated horizontal IDOR: any non-admin user executes tools on other users' MCP servers (cross-tenant file read + SSRF)
Source: CVE Program / CVE List V5
Vulnerability Description
MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.30, MCPHub scopes non-admin users to servers they own (list views and config edits enforce ownership), but the tool-execution API does not. Any authenticated non-admin user can invoke tools on MCP servers owned by other users — servers they cannot even see in GET /api/servers. Because connected MCP servers carry real capability (filesystem, HTTP fetch, cloud APIs with the owner's keys), this is cross-tenant compromise: demonstrated arbitrary host file read (/etc/passwd, another user's secrets) and SSRF. This issue has been patched in version 1.0.30.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
samanhappy mcphub < 1.0.30 -

II. Public POCs for CVE-2026-79750

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III. Intelligence Information for CVE-2026-79750

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Other References for CVE-2026-79750 (2)

Same Patch Batch · samanhappy · 2026-08-31 · 8 CVEs total

CVE-2026-79748 9.9 CRITICAL MCPHub: Authenticated non-admin user achieves RCE via POST /api/servers (missing authoriza
CVE-2026-79744 8.8 HIGH MCPHub: Missing Authorization on `PUT /api/system-config` Lets Any Non-Admin Rewrite Globa
CVE-2026-79746 8.1 HIGH MCPHub: Server-scoped bearer key gains access to an entire group via partial (any-overlap)
CVE-2026-79749 7.6 HIGH MCPHub: SSRF Guard Bypass via IPv6 Transition Addresses in URL Validation
CVE-2026-79745 7.1 HIGH MCPHub: Missing Authorization on Built-in Prompt & Resource CRUD (Unauthorized Tampering o
CVE-2026-79747 7.1 HIGH MCPHub vulnerable to SSRF: a non-admin user can make mcphub request arbitrary URLs and rea
CVE-2026-79743 6.9 MEDIUM MCPHub: Path Traversal via Malicious MCPB Manifest Name

IV. Related Vulnerabilities

Same product: mcphub
Same vendor: samanhappy
Same weakness: CWE-639

V. Comments for CVE-2026-79750

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