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CVE-2026-79746— MCPHub: Server-scoped bearer key gains access to an entire group via partial (any-overlap) server matching

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.

Saman MCPHub是Saman个人开发者的一个机器学习模型与人工智能应用的管理平台。 Saman MCPHub 1.0.31之前版本存在授权问题漏洞，该漏洞源于授权检查不当，当使用accessType为“servers”的bearer key访问组路由时，只要组内任一服务器在key的allowedServers列表中，isBearerKeyAllowedForRequest即授予对整个组的访问权限，且未在组级连接授权后重新检查allowedServers，导致被限定为单个服务器的key也可访问同组的

CVSS 8.1 · High EPSS 0.43% · P36 Updated Sep 01, 2026

Possible ATT&CK Techniques 2 AI

T1212 · Exploitation for Credential Access T1592 · Gather Victim Host Information

Affected Version Matrix 1

Vendor	Product	Version Range	Status
samanhappy	mcphub	`< 1.0.31`	affected

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I. Basic Information for CVE-2026-79746

Vulnerability Information

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Vulnerability Title

MCPHub: Server-scoped bearer key gains access to an entire group via partial (any-overlap) server matching

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 1.0.31, when a bearer key with accessType: 'servers' (or 'custom') is used against a group route, isBearerKeyAllowedForRequest grants access to the entire group as long as any single server in that group appears in the key's allowedServers list — not only when every server the key is scoped to matches, and critically, without ever re-checking allowedServers again once the group-level connection is authorized. A key explicitly scoped to one specific server therefore also grants full access to every other server that happens to share a group with it, including servers the key was never authorized for. This issue has been patched in version 1.0.31.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

授权机制不正确

Source: CVE Program / CVE List V5

Vulnerability Title

Saman MCPHub 授权问题漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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
samanhappy	mcphub	< 1.0.31	-

II. Public POCs for CVE-2026-79746

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-79746

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Patches & Fixes for CVE-2026-79746 (2)

Vendor Advisories for CVE-2026-79746 (1)

🔗 Server-scoped bearer key gains access to an entire group via partial (any-overlap) server matching · Advisory · samanhappy/mcphub · GitHub Read full article x_refsource_CONFIRM

Vendor Pages for CVE-2026-79746 (1)

🔗 Release v1.0.31 · samanhappy/mcphub · GitHub x_refsource_MISC

https://www.cve.org/CVERecord?id=CVE-2026-79746

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-2026-79750	7.7 HIGH	MCPHub authenticated horizontal IDOR: any non-admin user executes tools on other users' MC
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-863