CVE-2026-14539

An allocation of resources without limits vulnerability in the HTTP handler component of Google mcp-toolbox versions up to and including 1.4.0 allows an unauthenticated attacker to cause a denial of service (DoS). The /mcp endpoint handler reads incoming payloads directly into system memory using an unrestricted buffer loop (io.ReadAll) without applying defensive constraints such as http.MaxBytesReader or pre-read Content-Length enforcement. By submitting a single, massive HTTP request body, an attacker can linearly consume available host memory until the runtime process is terminated by an Out-Of-Memory (OOM) error.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/googleapis/mcp-toolbox/pull/3216	Issue Tracking Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:google:mcp_toolbox_for_databases:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-07-31 02:16

Updated : 2026-08-08 00:20

NVD link : CVE-2026-14539

Mitre link : CVE-2026-14539

CVE.ORG link : CVE-2026-14539

JSON object : View

Products Affected

google

mcp_toolbox_for_databases

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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