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

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

https://cvefeed.io/rssfeed/latest.atom / Fri, 04/17/2026 - 01:01
CVE ID :CVE-2026-39313
Published : April 16, 2026, 9:24 p.m. | 16 minutes ago
Description :mcp-framework is a framework for building Model Context Protocol (MCP) servers. In versions 0.2.21 and below, the readRequestBody() function in the HTTP transport concatenates request body chunks into a string with no size limit. Although a maxMessageSize configuration value exists, it is never enforced in readRequestBody(). A remote unauthenticated attacker can crash any mcp-framework HTTP server by sending a single large POST request to /mcp, causing memory exhaustion and denial of service. This issue has been fixed in version 0.2.22.
Severity: 0.0 | NA
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