Wednesday, 28 October 2026
1 agent hack today▼ 9 vs yesterday (10)

MySQL MCP Server SSE transport allows unauthenticated SQL execution (CVE-2026-59971)

The mysql-mcp-server MCP package, when run in SSE/HTTP transport mode, created its SSE transport without security settings, disabling DNS-rebinding protection and leaving all routes unauthenticated while binding to 0.0.0.0. This allowed network attackers or malicious web pages to invoke execute_sql for arbitrary unauthenticated SQL execution, data exfiltration, and potentially file read/write and RCE; 25 publicly reachable instances were found.

Disclosed 11 September 2026 · Record updated 1 October 2026

Impact

Unauthenticated arbitrary SQL execution against configured databases, full data exfiltration/modification, and possible arbitrary file read/write and RCE where the MySQL account has FILE privilege; internet scanning found 25 publicly reachable SSE instances.

Our coverage

Sources

  1. github.comhttps://github.com/advisories/GHSA-rqfv-2mw9-78g2