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MCP Ruby SDK: Streamable HTTP transport lacks DNS-rebinding (Host/Origin) protection

🗓️ 30 Jul 2026 14:41:39Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 6 Views

MCP Streamable HTTP transport lacks Host and Origin checks, enabling DNS rebinding to local servers.

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30 Jul 2026 14:41Current
6Medium risk
Vulners AI Score6
CVSS 46.9
EPSS0.00198
SSVC
6