Improper Link Resolution in Google MCP Toolbox for Databases
CVE-2026-102242

8.6HIGH

Key Information:

Vendor

Google
Status
Mcp Toolbox For Databases
Vendor
CVE Published:
29 September 2026

What is CVE-2026-102242?

The Google MCP Toolbox for Databases versions 1.2.0 through 1.9.0 contains a vulnerability due to improper link resolution in the path validation process for allowedLocalRoots. This allows an authenticated remote attacker with tool execution permissions to circumvent directory restrictions by exploiting symbolic links. By failing to resolve symbolic links prior to conducting path validation, the vulnerability permits unauthorized access or potential overwriting of sensitive local files that reside outside the defined root directories.

Affected Version(s)

MCP Toolbox for Databases 1.2.0 <= 1.9.0

References

https://github.com/googleapis/mcp-toolbox/pull/3810

CVSS V4

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Emmanuel David Karganilla
.