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Product · Google

mcp-toolbox

5 known vulnerabilities.

mcp-toolbox at a glance

Last 12 months
5
Critical · all time
0
Exploited · all time
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Public exploit · all time
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New vulnerabilities per month · last 12 months
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All Critical High Medium Low Exploited only Public exploit

5 results · Feed

  • High 8.0
    CVE-2026-14541

    Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider

    An authentication bypass and audience confusion vulnerability exists in the Google OAuth provider component of Google mcp-toolbox version 1.4.0. When a Google authService is initialized with mcpEnabled: true but lacks an explicitly defined audience or clientI…

    Google mcp-toolbox
  • High 8.0
    CVE-2026-14540

    Server-Side Request Forgery via Unrestricted HTTP Redirection in MCP Toolbox

    A Server-Side Request Forgery (SSRF) vulnerability exists in the generic HTTP source and tool components of Google mcp-toolbox versions 0.3.0 through 1.4.0. While the toolbox implements baseline input sanitization for user-controlled parameters, the underlyin…

    Google mcp-toolbox
  • Medium 6.6
    CVE-2026-14539

    Denial of Service via Unrestricted Payload Buffering in MCP Toolbox

    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 payl…

    Google mcp-toolbox
  • Medium 5.7
    CVE-2026-14538

    BigQuery Dataset Allowlist Bypass via Metadata Dry-Run in MCP Toolbox

    An improper authorization and security-boundary bypass vulnerability in the bigquery-execute-sql tool component of Google mcp-toolbox versions 0.16.1 through 1.4.0 allows an authenticated attacker to bypass allowedDatasets validation checks. The toolbox relie…

    Google mcp-toolbox
  • High 8.1
    CVE-2026-14537

    Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints

    Incorrect Authorization in the direct HTTP API tool invocation endpoint in Google mcp-toolbox versions v1.3.0 and v1.4.0 allows an unauthenticated attacker to invoke tools protected by the scopeRequired feature via sending tool invocation requests through leg…

    Google mcp-toolbox