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1 vulnerability by QuantGeekDev

CVE-2026-39313 (GCVE-0-2026-39313)

Vulnerability from cvelistv5 – Published: 2026-04-16 21:24 – Updated: 2026-04-16 21:24
VLAI?
Title
MCP-Framework: Unbounded memory allocation in readRequestBody allows denial of service via HTTP transport
Summary
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 ?
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
QuantGeekDev mcp-framework Affected: < 0.2.22
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            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
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            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
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      ],
      "problemTypes": [
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          "descriptions": [
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      "providerMetadata": {
        "dateUpdated": "2026-04-16T21:24:27.328Z",
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      "references": [
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      "source": {
        "advisory": "GHSA-353c-v8x9-v7c3",
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      "title": "MCP-Framework: Unbounded memory allocation in readRequestBody allows denial of service via HTTP transport"
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