CVE-2026-11719
An authenticated authorization bypass vulnerability exists in MCP Toolbox for Databases due to missing scope enforcement across older protocol handlers. While the 2025-11-25 protocol version handler correctly enforces per-tool restrictions defined by scopesRequired, older supported protocol versions (2025-06-18, 2025-03-26, and 2024-11-05) omit this check. An authenticated client with low-privilege tokens (e.g., read) can bypass the intended per-tool scope restrictions and execute high-privilege tools (e.g., admin) simply by specifying an older protocol version in the MCP-Protocol-Version header, or by omitting the header entirely (which causes the server to default to the vulnerable 2024-11-05 handler).
| CWE | CWE-862 |
| Vendor | |
| Product | mcp toolbox for databases (googleapis/mcp-toolbox) |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 18, 2026 |
| Last Updated | Jun 18, 2026 |
Get instant alerts for google mcp toolbox for databases (googleapis/mcp-toolbox)
Be the first to know when new unknown vulnerabilities affecting google mcp toolbox for databases (googleapis/mcp-toolbox) are published — delivered to Slack, Telegram or Discord.