Missing Authorization in MCP Toolbox for Databases allows Arbitrary File Read and Write

published 2026-10-26 14 d ago modified 2026-10-26 13 d ago also EUVD-2026-109936

cvss: 9.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 links 1

Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox) 1.5.0

github.com/googleapis/mcp-toolbox#3454 pull request

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 13 d ago (2026-10-26)

Exploit prediction

0.53% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	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/U:Amber
CNA	4.0	9.3	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:Amber

Affected products

Google Cloud MCP Toolbox for Databases (googleapis/mcp-toolbox)

Classification

Weakness

CWE-862 Missing Authorization
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

github.com /googleapis/mcp-toolbox/pull/3454

Sources

CVE List CVE-2026-93328
NVD CVE-2026-93328

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary