CVE-2026-14537

The CVE-2026-14537 entry concerns Google mcp-toolbox versions v1.3.0 and v1.4.0 with Incorrect Authorization in the direct HTTP API tool invocation endpoint. The underlying issue allows an unauthenticated attacker to invoke tools protected by the scopeRequired feature by sending tool invocation r...

CVE-2026-11717

CVE-2026-11717 details an authentication bypass in googleapis/mcp-toolbox, specifically in the validateOpaqueToken path. When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint (RFC 7662), the toolbox decodes the response into an introspectResp with Active as a *bool. The ...

CVE-2026-11719

CVE-2026-11719 describes an authenticated authorization bypass in MCP Toolbox for Databases due to missing scope enforcement on older protocol handlers. The 2025-11-25 protocol version handler enforces per-tool scope restrictions, but older versions (2025-06-18, 2025-03-26, 2024-11-05) omit this ...

CVE-2026-14541

The CVE concerns Google mcp-toolbox version 1.4.0 in its Google OAuth provider component. If an authService is initialized with mcpEnabled: true but without an explicit audience or clientId, the ValidateMCPAuth pipeline for opaque tokens omits audience validation. This causes the toolbox to accep...

CVE-2026-11718

The CVE-2026-11718 entry concerns an authentication bypass in googleapis/mcp-toolbox: during opaque-token validation via an OAuth 2.0 introspection endpoint, the code decodes the response and checks issuer with the condition a.issuer != "" && iss != "". If the introspection response omits iss, is...

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...

CVE-2026-14540

CVE-2026-14540 reports an SSRF in Google mcp-toolbox, affecting versions 0.3.0 through 1.4.0. The issue lies in the HTTP client (internal/sources/http/http.go), which initializes without a restrictive CheckRedirect policy and lacks target IP validation. An attacker could provide a crafted path pa...

CVE-2026-16481

A Server-Side Request Forgery (SSRF) and credential exfiltration vulnerability exists in the cloud-healthcare-fhir-fetch-page tool within googleapis/mcp-toolbox . The tool fails to validate the pageURL parameter, allowing an attacker to provide an arbitrary external URL. Because the underlying tr...

CVE-2026-14538

CVE-2026-14538 : The bigquery-execute-sql tool in Google MCP Toolbox (versions 0.16.1–1.4.0) contains an improper authorization and security-boundary bypass. A fail-open flaw in the BigQuery dry-run validation allows an authenticated attacker to bypass allowedDatasets checks when the API returns ...

CVE-2026-14539

The CVE affects Google mcp-toolbox versions up to 1.4.0, where the HTTP /mcp endpoint reads request bodies into memory using an unrestricted buffer (io.ReadAll) without limits. This unbounded buffering enables an unauthenticated attacker to cause a DoS by exhausting host memory, ultimately leadin...

CVE-2026-15829

CVE-2026-15829 affects googleapis/mcp-toolbox (bigquery-forecast). The prebuilt forecasting tool interpolates client-controlled parameters (data_col, timestamp_col, id_cols) into a generated AI.FORECAST query via fmt.Sprintf without re-validation, enabling SQL injection (CWE-89) and a security bo...