CVE-2026-39313: MCP-Framework: Unbounded memory allocation in readRequestBody allows denial of service via HTTP transport

April 16, 2026 (updated April 24, 2026)

The readRequestBody() function in src/transports/http/server.ts concatenates HTTP request body chunks into a string with no size limit, allowing a remote unauthenticated attacker to crash the server via memory exhaustion with a single large HTTP POST request.

References

github.com/QuantGeekDev/mcp-framework
github.com/QuantGeekDev/mcp-framework/commit/f97d2bb76d6359faf10cd1fc54b4911476b62524
github.com/QuantGeekDev/mcp-framework/security/advisories/GHSA-353c-v8x9-v7c3
github.com/advisories/GHSA-353c-v8x9-v7c3
nvd.nist.gov/vuln/detail/CVE-2026-39313

Code Behaviors & Features

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