High 8.1Published Aug 31, 2026

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

Updated under an hour ago (2026-10-19 08:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Awaiting Analysis
Record last updated: Sep 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

samanhappy mcphub samanhappy:mcphub (from the name)	before 1.0.31	CNA record

References

https://github.com/samanhappy/mcphub/security/advisories/GHSA-454m-4vm6-842fx-refsource-confirm
https://github.com/samanhappy/mcphub/pull/1059x-refsource-misc
https://github.com/samanhappy/mcphub/commit/2b10ae36112ce68deebf910b22505d44efcef552x-refsource-misc
https://github.com/samanhappy/mcphub/releases/tag/v1.0.31x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.