CVE-2026-93328
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Path Traversal and Missing Authorization in Google Cloud MCP Toolbox

Publication date: 2026-10-26

Last updated on: 2026-10-26

Assigner: GoogleCloud

Description
Path Traversal and Missing Authorization in cloud-storage source in Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox) versions 1.2.0 through 1.4.0 allows an unauthenticated remote attacker to exfiltrate host files to external Google Cloud Storage buckets and overwrite arbitrary local files via crafted tool invocation parameters.

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Meta Information

Published
2026-10-26
Last Modified
2026-10-26
Generated
2026-10-26
AI Q&A
2026-10-26
EPSS Evaluated
N/A
NVD
CVE-2026-93328
EUVD
EUVD-2026-109936

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox) 1.2.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

This vulnerability involves Path Traversal and Missing Authorization in the cloud-storage source of Google Cloud MCP Toolbox for Databases versions 1.2.0 through 1.4.0. An unauthenticated remote attacker can exploit crafted tool invocation parameters to exfiltrate host files to external Google Cloud Storage buckets or overwrite arbitrary local files.

Impact Analysis

An attacker could steal sensitive files from your system or replace critical files with malicious ones, leading to data breaches, system compromise, or unauthorized access. The high CVSS score (9.3) indicates severe potential impact.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Non-compliance risks include legal penalties and reputational damage.

Mitigation Strategies

Upgrade to version 1.5.0 or later of googleapis/mcp-toolbox to enable the allowedBuckets and allowedLocalRoots configuration options. These settings restrict operations to specific Google Cloud Storage buckets and local filesystem paths, preventing unauthorized access.

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