CVE-2026-15829 — SQL Injection and Security Boundary Bypass in googleapis/mcp-toolbox

Description (CNA)

A SQL injection (CWE-89) and security boundary bypass (CWE-863) vulnerability exists in the prebuilt BigQuery forecasting tool (bigquery-forecast) of googleapis/mcp-toolbox. The tool accepts client-controlled parameters (data_col, timestamp_col, and id_cols) as plain strings and interpolates them unescaped via fmt.Sprintf directly into a generated AI.FORECAST table-valued SELECT statement. While MCP Toolbox utilizes an allowedDatasets mechanism to restrict queries, this defense only validates the history_data parameter; the final assembled query is executed without re-validation. An attacker can break out of the string literal fields (such as timestamp_col) to inject a valid multi-statement or cross-dataset query block. This allows an unauthorized user to bypass the operator-configured allowedDatasets boundary and read arbitrary BigQuery tables.

Affected (CNA)

Vendor / product	Versions
Google / MCP Toolbox for Databases (googleapis/mcp-toolbox)	affected 0.13.0 through 1.3.0

CWE

CWE-89, CWE-863

References

https://github.com/googleapis/mcp-toolbox/pull/3324

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.