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18 vulnerabilities found for mcp_toolbox_for_databases by google
CVE-2026-14541 (GCVE-0-2026-14541)
Vulnerability from nvd – Published: 2026-07-31 01:48 – Updated: 2026-07-31 16:14
VLAI
EPSS
VEX
Title
Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider
Summary
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 clientId, the ValidateMCPAuth pipeline for opaque tokens skips audience validation entirely. As a result, the toolbox will accept any valid Google OAuth access token—even those minted for unrelated ecosystem applications—granting unauthorized clients access to protected tools and data backends.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:14 UTC
CWE
- CWE-287 - (Improper Authentication)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
1.4.0
(semver)
|
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CVE-2026-14540 (GCVE-0-2026-14540)
Vulnerability from nvd – Published: 2026-07-31 01:46 – Updated: 2026-07-31 16:12
VLAI
EPSS
VEX
Title
Server-Side Request Forgery via Unrestricted HTTP Redirection in MCP Toolbox
Summary
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 underlying HTTP client (internal/sources/http/http.go) fails to safely regulate request redirection boundaries. Specifically, the client is initialized without a restrictive CheckRedirect policy hook and lacks target IP validation. An attacker or a malicious data-driven prompt can supply a crafted path parameter that triggers an open redirect or a direct destination swap on the target backend, coercing the mcp-toolbox into blindly following the redirection and making unauthorized requests to internal or arbitrary external endpoints.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:12 UTC
CWE
- CWE-918 - (Server-Side Request Forgery (SSRF))
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
0.3.0 , ≤ 1.4.0
(semver)
|
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CVE-2026-14539 (GCVE-0-2026-14539)
Vulnerability from nvd – Published: 2026-07-31 01:45 – Updated: 2026-07-31 16:11
VLAI
EPSS
VEX
Title
Denial of Service via Unrestricted Payload Buffering in MCP Toolbox
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:10 UTC
CWE
- CWE-770 - (Allocation of Resources Without Limits or Throttling)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
0.0.0 , ≤ 1.4.0
(semver)
|
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CVE-2026-14538 (GCVE-0-2026-14538)
Vulnerability from nvd – Published: 2026-07-31 01:42 – Updated: 2026-07-31 16:09
VLAI
EPSS
VEX
Title
BigQuery Dataset Allowlist Bypass via Metadata Dry-Run in MCP Toolbox
Summary
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 enforce dataset restrictions, but due to a fail-open logic flaw, it bypasses validation when the API returns an empty array for specialized constructs. This allows the attacker to extract structural DDL schemas for explicitly excluded datasets via INFORMATION_SCHEMA, and access downstream federated row data via EXTERNAL_QUERY connections.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:09 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
0.16.1 , ≤ 1.4.0
(semver)
|
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CVE-2026-14537 (GCVE-0-2026-14537)
Vulnerability from nvd – Published: 2026-07-31 01:38 – Updated: 2026-07-31 16:08
VLAI
EPSS
VEX
Title
Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints
Summary
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-api flag is active.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:04 UTC
CWE
- CWE-863 - (Incorrect Authorization)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
1.3.0
Affected: v1.4.0 |
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CVE-2026-11720 (GCVE-0-2026-11720)
Vulnerability from nvd – Published: 2026-06-29 17:51 – Updated: 2026-06-29 18:26
VLAI
EPSS
VEX
Title
Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder
Summary
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 input does not alter the scheme, host, or user info, it relies on ResolveReference for the final URL resolution. Because dot segments (../) are normalized during this resolution step, an attacker can supply path parameters containing directory traversal sequences to escape the operator-configured path scope. This allows the client to coerce the toolbox into making requests to unintended endpoints on the same target host while forwarding the toolbox's configured credentials (e.g., bypassing a restricted path like /api/v1/users/{{.id}} to reach /admin/secrets).
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 18:25 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
Affected:
0 , < 1.3.0
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CVE-2026-11719 (GCVE-0-2026-11719)
Vulnerability from nvd – Published: 2026-06-18 11:55 – Updated: 2026-06-18 13:53
VLAI
EPSS
VEX
Summary
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 versions (2025-06-18, 2025-03-26, and 2024-11-05) omit this check. An authenticated client with low-privilege tokens (e.g., read) can bypass the intended per-tool scope restrictions and execute high-privilege tools (e.g., admin) simply by specifying an older protocol version in the MCP-Protocol-Version header, or by omitting the header entirely (which causes the server to default to the vulnerable 2024-11-05 handler).
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 12:55 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
Affected:
1.3.0
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CVE-2026-11718 (GCVE-0-2026-11718)
Vulnerability from nvd – Published: 2026-06-18 11:52 – Updated: 2026-06-18 13:53
VLAI
EPSS
VEX
Summary
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 subsequent claim-checking logic (validateClaims) evaluates the issuer condition as if a.issuer != "" && iss != "". If the external OAuth provider's introspection response omits the optional iss (issuer) field completely, the variable iss defaults to an empty string. This causes the conditional block to evaluate to false and be skipped silently. Consequently, the application accepts tokens issued by unauthorized or unintended third-party identity providers.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 13:01 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
Affected:
1.0.0 , ≤ 1.3.0
(semver)
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CVE-2026-11717 (GCVE-0-2026-11717)
Vulnerability from nvd – Published: 2026-06-18 11:50 – Updated: 2026-06-18 12:23
VLAI
EPSS
VEX
Summary
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 the Active field is declared as a pointer to a boolean (*bool). The code only explicitly rejects a token if the response contains a populated active field set to false (if introspectResp.Active != nil && !*introspectResp.Active). If an introspection endpoint responds with a payload that completely omits the mandatory active key, the internal variable remains nil, causing the conditional check to short-circuit. As a result, Toolbox accepts authorization tokens missing the "active" field, granting access to protected tools and underlying data sources.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 12:23 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
Affected:
1.0.0 , ≤ 1.3.0
(semver)
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CVE-2026-14541 (GCVE-0-2026-14541)
Vulnerability from cvelistv5 – Published: 2026-07-31 01:48 – Updated: 2026-07-31 16:14
VLAI
EPSS
VEX
Title
Authentication Bypass and Audience Confusion in MCP Toolbox OAuth Provider
Summary
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 clientId, the ValidateMCPAuth pipeline for opaque tokens skips audience validation entirely. As a result, the toolbox will accept any valid Google OAuth access token—even those minted for unrelated ecosystem applications—granting unauthorized clients access to protected tools and data backends.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:14 UTC
CWE
- CWE-287 - (Improper Authentication)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
1.4.0
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CVE-2026-14540 (GCVE-0-2026-14540)
Vulnerability from cvelistv5 – Published: 2026-07-31 01:46 – Updated: 2026-07-31 16:12
VLAI
EPSS
VEX
Title
Server-Side Request Forgery via Unrestricted HTTP Redirection in MCP Toolbox
Summary
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 underlying HTTP client (internal/sources/http/http.go) fails to safely regulate request redirection boundaries. Specifically, the client is initialized without a restrictive CheckRedirect policy hook and lacks target IP validation. An attacker or a malicious data-driven prompt can supply a crafted path parameter that triggers an open redirect or a direct destination swap on the target backend, coercing the mcp-toolbox into blindly following the redirection and making unauthorized requests to internal or arbitrary external endpoints.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:12 UTC
CWE
- CWE-918 - (Server-Side Request Forgery (SSRF))
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
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CVE-2026-14539 (GCVE-0-2026-14539)
Vulnerability from cvelistv5 – Published: 2026-07-31 01:45 – Updated: 2026-07-31 16:11
VLAI
EPSS
VEX
Title
Denial of Service via Unrestricted Payload Buffering in MCP Toolbox
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:10 UTC
CWE
- CWE-770 - (Allocation of Resources Without Limits or Throttling)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
0.0.0 , ≤ 1.4.0
(semver)
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CVE-2026-14538 (GCVE-0-2026-14538)
Vulnerability from cvelistv5 – Published: 2026-07-31 01:42 – Updated: 2026-07-31 16:09
VLAI
EPSS
VEX
Title
BigQuery Dataset Allowlist Bypass via Metadata Dry-Run in MCP Toolbox
Summary
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 enforce dataset restrictions, but due to a fail-open logic flaw, it bypasses validation when the API returns an empty array for specialized constructs. This allows the attacker to extract structural DDL schemas for explicitly excluded datasets via INFORMATION_SCHEMA, and access downstream federated row data via EXTERNAL_QUERY connections.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:09 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
0.16.1 , ≤ 1.4.0
(semver)
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CVE-2026-14537 (GCVE-0-2026-14537)
Vulnerability from cvelistv5 – Published: 2026-07-31 01:38 – Updated: 2026-07-31 16:08
VLAI
EPSS
VEX
Title
Authorization Bypass in MCP Toolbox Legacy HTTP Endpoints
Summary
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-api flag is active.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-31 16:04 UTC
CWE
- CWE-863 - (Incorrect Authorization)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mcp-toolbox |
Affected:
1.3.0
Affected: v1.4.0 |
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CVE-2026-11720 (GCVE-0-2026-11720)
Vulnerability from cvelistv5 – Published: 2026-06-29 17:51 – Updated: 2026-06-29 18:26
VLAI
EPSS
VEX
Title
Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder
Summary
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 input does not alter the scheme, host, or user info, it relies on ResolveReference for the final URL resolution. Because dot segments (../) are normalized during this resolution step, an attacker can supply path parameters containing directory traversal sequences to escape the operator-configured path scope. This allows the client to coerce the toolbox into making requests to unintended endpoints on the same target host while forwarding the toolbox's configured credentials (e.g., bypassing a restricted path like /api/v1/users/{{.id}} to reach /admin/secrets).
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 18:25 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
Affected:
0 , < 1.3.0
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CVE-2026-11719 (GCVE-0-2026-11719)
Vulnerability from cvelistv5 – Published: 2026-06-18 11:55 – Updated: 2026-06-18 13:53
VLAI
EPSS
VEX
Summary
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 versions (2025-06-18, 2025-03-26, and 2024-11-05) omit this check. An authenticated client with low-privilege tokens (e.g., read) can bypass the intended per-tool scope restrictions and execute high-privilege tools (e.g., admin) simply by specifying an older protocol version in the MCP-Protocol-Version header, or by omitting the header entirely (which causes the server to default to the vulnerable 2024-11-05 handler).
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 12:55 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
Affected:
1.3.0
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CVE-2026-11718 (GCVE-0-2026-11718)
Vulnerability from cvelistv5 – Published: 2026-06-18 11:52 – Updated: 2026-06-18 13:53
VLAI
EPSS
VEX
Summary
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 subsequent claim-checking logic (validateClaims) evaluates the issuer condition as if a.issuer != "" && iss != "". If the external OAuth provider's introspection response omits the optional iss (issuer) field completely, the variable iss defaults to an empty string. This causes the conditional block to evaluate to false and be skipped silently. Consequently, the application accepts tokens issued by unauthorized or unintended third-party identity providers.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 13:01 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
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CVE-2026-11717 (GCVE-0-2026-11717)
Vulnerability from cvelistv5 – Published: 2026-06-18 11:50 – Updated: 2026-06-18 12:23
VLAI
EPSS
VEX
Summary
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 the Active field is declared as a pointer to a boolean (*bool). The code only explicitly rejects a token if the response contains a populated active field set to false (if introspectResp.Active != nil && !*introspectResp.Active). If an introspection endpoint responds with a payload that completely omits the mandatory active key, the internal variable remains nil, causing the conditional check to short-circuit. As a result, Toolbox accepts authorization tokens missing the "active" field, granting access to protected tools and underlying data sources.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-18 12:23 UTC
CWE
- CWE-287 - Improper Authentication
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MCP Toolbox for Databases (googleapis/mcp-toolbox) |
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