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CVE-2026-67430 MCP Ruby SDK: Unbounded session retention in StreamableHTTPTransport allows memory exhaustion via initialize flood

🗓️ 29 Jul 2026 19:10:39Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 2 Views

CVE-2026-67430: MCP Ruby SDK may retain unbounded sessions in StreamableHTTPTransport, causing memory exhaustion; fixed in 0.23.0.

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