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CVE-2026-79749 Details

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 1.0.32, MCPHub's SSRF guard in src/utils/ssrf.ts uses a custom isBlockedIpv6 function that only checks for loopback, link-local, unique-local, IPv4-mapped, and IPv4-compatible IPv6 addresses. IPv6 transition address families -- NAT64 (64:ff9b::/96), 6to4 (2002::/16), and Teredo (2001::/32) -- are not checked. An attacker who can specify a URL for an MCP server connection can encode a private IPv4 address inside one of these IPv6 forms to bypass the SSRF guard and reach internal infrastructure. This issue has been patched in version 1.0.32.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw	CISA-ADP
https://github.com/samanhappy/mcphub/commit/2b10ae36112ce68deebf910b22505d44efcef552	[email protected]
https://github.com/samanhappy/mcphub/pull/1069	[email protected]
https://github.com/samanhappy/mcphub/releases/tag/v1.0.32	[email protected]
https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Aug 31, 2026	CVE Modified	CISA-ADP
Aug 31, 2026	New CVE Received	[email protected]