CVE-2026-102242 — Path Traversal via Symlink Following in allowedLocalRoots in MCP Toolbox for Databases

CVE-2026-102242

Path Traversal via Symlink Following in allowedLocalRoots in MCP Toolbox for Databases PUBLISHED

Description (CNA)

Improper link resolution (CWE-59 / CWE-22) in the allowedLocalRoots path validation in Google MCP Toolbox for Databases versions 1.2.0 through 1.9.0 allows a remote authenticated attacker with tool execution permissions to bypass directory boundary restrictions via symbolic links. Because path validation checks directories lexically without resolving symbolic links first, an attacker can access or overwrite arbitrary local files located outside the permitted root directories.

Affected (CNA)

Vendor / product	Versions
Google / MCP Toolbox for Databases	affected 1.2.0 through 1.9.0

CWE

CWE-59, CWE-22

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.