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.
Published: 2026-08-31
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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History

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 31 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Samanhappy
Samanhappy mcphub
Vendors & Products Samanhappy
Samanhappy mcphub

Mon, 31 Aug 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title MCPHub: Server-scoped bearer key gains access to an entire group via partial (any-overlap) server matching
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Subscriptions

Samanhappy Mcphub
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-01T14:59:30.891Z

Reserved: 2026-08-25T14:08:18.108Z

Link: CVE-2026-79746

cve-icon Vulnrichment

Updated: 2026-09-01T14:16:54.723Z

cve-icon NVD

Status : Received

Published: 2026-08-31T18:17:20.057

Modified: 2026-09-01T15:17:29.747

Link: CVE-2026-79746

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T21:20:42Z

Weaknesses