CVE-2026-85788 - Issue with awslabs mysql-mcp-server

Bulletin ID: 2026-103-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/09/2026 09:30 AM PDT Description: We identified an issue in awslabs.mysql-mcp-server (an open-source, self-hosted Model Context Protocol server distributed via github.com/awslabs/mcp and PyPI). In affected versions, under certain conditions the read-only enforcement could be circumvented via SQL inline comments, allowing a statement to run that the read-only check was expected to block. The read-only mode provided by the server is a best-effort safeguard and is not a substitute for correct...