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GHSA-G53W-W6MJ-HRPP MCP Gateway: Authority-injection and JWT/session bypass via the unauthenticated router hair-pin "router-key" / "mcp-init-host" path

🗓️ 19 May 2026 19:42:46Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 5 Views

MCP router bypasses JWT validation and rewrites authority when mcp-init-host is present, gated by router-key.

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21 Jul 2026 15:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 49.3
5