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Vulnerability details

CVE-2026-15829

Google MCP Toolbox for Databases

SQL Injection and Security Boundary Bypass in googleapis/mcp-toolbox

CVSS 4.0
8.6High

Official description

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.

CVSS scores

ScoreVersionSourceVector
8.6High 4.0 CVEProject cvelistV5 (CNA) (Google) CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Affected products

VendorProductVersionsSource
Google MCP Toolbox for Databases (googleapis/mcp-toolbox) 0.13.0 ≤ v ≤ 1.3.0 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-07-21
Last updated
2026-07-22
State
Published
Assigner (CNA)
Google

Exploit prediction (EPSS)

0.19%
Probability of exploitation in 30 days
9.5%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-89
    Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
  • CWE-863
    Incorrect Authorization