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MCP Ruby SDK: Unbounded JSON-RPC request body causes uncontrolled memory allocation in StreamableHTTPTransport

🗓️ 30 Jul 2026 14:44:06Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 6 Views

Unauthenticated attacker can cause memory exhaustion by oversized JSON-RPC requests to the transport.

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30 Jul 2026 14:44Current
6Medium risk
Vulners AI Score6
CVSS 3.17.5
EPSS0.00436
SSVC
6