MCPHub: SSRF Guard Bypass via IPv6 Transition Addresses in URL Validation
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,…
Severity high: primary CNA CVSS 7.6 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-08-31T17:54:45.423Z. Updated 2026-08-31T18:48:57.445Z.