Model Context Protocol · weakness class
Denial of Service
11 CVEs
Every dot is a CVE in what this vendor ships; the named ones are the most at risk.
Every one of the 11 is a mark on the map. Named now: 1 to 11, most at risk first.
- MCP Ruby SDK: Unbounded JSON-RPC request body causes uncontrolled memory allocation in StreamableHTTPTransport
- Model Context Protocol Python SDK HTTP and OAuth endpoints allow memory exhaustion through unbounded request bodies
- MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service
- Model Context Protocol Java SDK HTTP server transports allow memory exhaustion through unbounded request bodies
- Model Context Protocol TypeScript SDK: One HTTP request within the default size limit could exhaust server memory during validation
- RMCP: Unauthenticated permanent session-table leak in rmcp Streamable HTTP server transport leads to remote denial-of-service
- MCP Python SDK: Unbounded Session Accumulation in StreamableHTTP Transport Enables Resource Exhaustion
- MCP Ruby SDK: Unbounded session retention in StreamableHTTPTransport allows memory exhaustion via initialize flood
- MCP Kotlin SDK through 0.15.0 Memory Exhaustion via Application.mcpWebSocket
- MCP Ruby SDK: Unbounded line buffer in stdio transports leads to memory exhaustion (DoS)
- MCP Kotlin SDK's unbounded line buffer in StdioServerTransport/StdioClientTransport leads to memory exhaustion (DoS)
exploited in the wildcheck availableringed, named or not: CyberSIXT has reported on it
Zoom in on the map and the dots under the middle of it are named where they are.
Data as of 2026-11-15. CVE List through 2026-11-15 · EPSS of 2026-11-14 · CISA KEV checked 2026-11-15. Sources: the CVE List, CISA KEV, EPSS, NVD, nuclei templates and public bug bounty data.