CVE-2026-39313

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/QuantGeekDev/mcp-framework/commit/f97d2bb76d6359faf10cd1fc54b4911476b62524
https://github.com/QuantGeekDev/mcp-framework/security/advisories/GHSA-353c-v8x9-v7c3

Configurations

No configuration.

History

16 Apr 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-16 22:16

Updated : 2026-04-17 15:38

NVD link : CVE-2026-39313

Mitre link : CVE-2026-39313

CVE.ORG link : CVE-2026-39313

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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