{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-11720",
        "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "state": "PUBLISHED",
        "assignerShortName": "Google",
        "dateReserved": "2026-06-09T00:57:55.333Z",
        "datePublished": "2026-06-29T17:51:30.077Z",
        "dateUpdated": "2026-06-29T18:26:17.242Z"
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                "orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
                "shortName": "Google",
                "dateUpdated": "2026-06-29T17:51:30.077Z"
            },
            "title": "Path Traversal in googleapis/mcp-toolbox HTTP Tool URL Builder",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-22",
                            "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-139",
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                            "lang": "en",
                            "value": "CAPEC-139: Relative Path Traversal"
                        }
                    ]
                }
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            "affected": [
                {
                    "vendor": "Google",
                    "product": "MCP Toolbox for Databases (googleapis/mcp-toolbox)",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "1.3.0",
                            "versionType": "semver"
                        }
                    ],
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox.\n\nWhen 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).",
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                            "value": "A path traversal vulnerability exists in the HTTP tool URL builder of googleapis/mcp-toolbox.\n\nWhen 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)."
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://github.com/googleapis/mcp-toolbox/pull/3218"
                }
            ],
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "NOT_DEFINED",
                        "providerUrgency": "NOT_DEFINED",
                        "version": "4.0",
                        "baseSeverity": "CRITICAL",
                        "baseScore": 9.3,
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                    "lang": "en",
                    "value": "Ryan Vonbrubeck / @dodge1218",
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            "source": {
                "discovery": "UNKNOWN"
            },
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                                "timestamp": "2026-06-29T18:25:08.204755Z",
                                "id": "CVE-2026-11720",
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                                        "Exploitation": "none"
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