CVE-2026-15829: SQL Injection and Security Boundary Bypass in googleapis/mcp-toolbox
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 (datacol, timestampcol, and idcols) 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 historydata parameter; the final assembled query is executed without re-validation.
An attacker can break out of the string literal fields (such as timestampcol) 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 Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2026-15829?
The severity of CVE-2026-15829 is rated high with a score of 8.6 based on the CVSS v3.1 metrics.
What type of vulnerabilities are present in CVE-2026-15829?
CVE-2026-15829 includes SQL Injection (CWE-89) and security boundary bypass (CWE-863) vulnerabilities.
How do I fix CVE-2026-15829?
To fix CVE-2026-15829, validate and sanitize all client-controlled parameters before processing them in the BigQuery forecasting tool.
Which software is affected by CVE-2026-15829?
CVE-2026-15829 affects the prebuilt BigQuery forecasting tool (bigquery-forecast) in the googleapis/mcp-toolbox.
When was CVE-2026-15829 published?
CVE-2026-15829 was published on July 21, 2026.