CVE-2026-93328
Missing Authorization in MCP Toolbox for Databases allows Arbitrary File Read and Write
- Published
- Oct 26, 2026
- Updated
- Oct 26, 2026
- Assigning CNA
- GoogleCloud
- Evidence observed
- Nov 4, 2026
Primary CVSS
nvd · CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:AmberLow · next 30 days
- Percentile
- 44.7%
- Model date
- Nov 4, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
The authorization layer CVE-2026-93328 was missing: scoped grants, path confinement, and signed receipts in front of MCP storage tools. CVE reproduction + gated proof, 10/10 tests.
Responsible use
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