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 relies on the BigQuery dry-run API to enfor...

CVE-2026-14538

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 relies on the BigQuery dry-run API to enfor...

EUVD-2026-51372

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 relies on the BigQuery dry-run API to enfor...

CVE-2026-14537

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 legacy HTTP endpoints when the --enable-a...

EUVD-2026-51371

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 legacy HTTP endpoints when the --enable-a...

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 legacy HTTP endpoints when the --enable-a...

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 legacy HTTP endpoints when the --enable-a...

CVE-2026-15829 SQL Injection and Security Boundary Bypass in googleapis/mcp-toolbox

A SQL injection CWE-89 and security boundary bypass CWE-863 vulnerability exists in the prebuilt BigQuery forecasting tool bigquery-forecast of googleapis/mcp-toolbox. The tool accepts client-controlled parameters datacol, timestampcol, and idcols as plain strings and interpolates them unescaped...

GO-2026-5870 MCP Toolbox for Databases vulnerable to DNS rebinding attacks in github.com/googleapis/mcp-toolbox

MCP Toolbox for Databases vulnerable to DNS rebinding attacks in github.com/googleapis/mcp-toolbox...

GHSA-VWXW-JRG6-9JXV MCP Toolbox HTTP tool path parameters allow traversal to unintended endpoints

A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox. When constructing downstream API requests, the URL builder substitutes user-controlled pathParams into the configured tool path and parses the resulting string as a relative URL. While it checks that the...

CVE-2026-11720

A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox. When constructing downstream API requests, the URL builder substitutes user-controlled pathParams into the configured tool path and parses the resulting string as a relative URL. While it checks that the...

CVE-2026-11720 Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder

A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox. When constructing downstream API requests, the URL builder substitutes user-controlled pathParams into the configured tool path and parses the resulting string as a relative URL. While it checks that the...

CVE-2026-11720

The CVE-2026-11720 entry describes a path traversal flaw in the HTTP tool URL builder of googleapis/mcp-toolbox. User-controlled pathParams are substituted into a configured tool path and then parsed as a relative URL; while scheme/host/user info are checked, final resolution uses ResolveReferenc...

GO-2026-5706 googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox

googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path validateOpaqueToken in github.com/googleapis/mcp-toolbox...

GO-2026-5251 googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken) in github.com/googleapis/mcp-toolbox

googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path validateOpaqueToken in github.com/googleapis/mcp-toolbox...

GO-2026-5144 MCP Toolbox for Databases: authenticated authorization bypass in github.com/googleapis/mcp-toolbox

MCP Toolbox for Databases: authenticated authorization bypass in github.com/googleapis/mcp-toolbox...

Authentication Bypass

github.com/googleapis/mcp-toolbox is vulnerable to Authentication Bypass. The vulnerability is due to improper validation of the optional issuer iss claim during OAuth 2.0 opaque token introspection. If the introspection response omits the iss field, the issuer validation is silently skipped, whi...

GHSA-5GF6-GC35-XJPC MCP Toolbox for Databases: authenticated authorization bypass

An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handlers. While the 2025-11-25 protocol version handler correctly enforces per-tool restrictions defined by scopesRequired, older supported protocol...

CVE-2026-11718

An authentication bypass vulnerability exists in the generic opaque token validation path validateOpaqueToken of googleapis/mcp-toolbox. When the toolbox validates an opaque token via an OAuth 2.0 introspection endpoint RFC 7662, it decodes the response into an introspectResp struct. However, the...

CVE-2026-11717

An authentication bypass vulnerability exists in the generic opaque token validation path validateOpaqueToken of googleapis/mcp-toolbox. When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint RFC 7662, the toolbox decodes the response into an introspectResp struct where t...