---
id: CVE-2026-59971
title: >-
  MySQL MCP Server is a Model Context Protocol server that enables secure
  interaction with MySQL databases
summary: >-
  MySQL MCP Server is a Model Context Protocol server that enables secure
  interaction with MySQL databases. Prior to 0.4.2, setting MCP_TRANSPORT=sse
  causes src/mysql_mcp_server/server.py to construct SseServerTransport without
  security_se…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-306
  - CWE-346
vendor: designcomputer
product: mysql_mcp_server
affected:
  - mysql_mcp_server < 0.4.2
patched:
  - mysql-mcp-server 0.4.2
published: '2026-09-15'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T16:17:17.263'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59971'
references:
  - url: >-
      https://github.com/designcomputer/mysql_mcp_server/commit/a96549f4a4d65443fd6e9c7f2324fba9a5c80a82
    label: security-advisories@github.com
  - url: 'https://github.com/designcomputer/mysql_mcp_server/issues/92'
    label: security-advisories@github.com
  - url: 'https://github.com/designcomputer/mysql_mcp_server/releases/tag/v0.4.2'
    label: security-advisories@github.com
  - url: >-
      https://github.com/designcomputer/mysql_mcp_server/security/advisories/GHSA-rqfv-2mw9-78g2
    label: security-advisories@github.com
  - url: 'https://github.com/designcomputer/mysql_mcp_server'
tags:
  - nvd
  - cve.org
  - osv
  - pip
aliases:
  - GHSA-rqfv-2mw9-78g2
ecosystem: pip
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-15T15:07:25.603382Z'
ingestedAt: '2026-09-12T03:13:01.726Z'
epss: 0.00418
epssPercentile: 0.33455
---

## Overview

MySQL MCP Server is a Model Context Protocol server that enables secure interaction with MySQL databases. Prior to 0.4.2, setting MCP_TRANSPORT=sse causes src/mysql_mcp_server/server.py to construct SseServerTransport without security_settings or enable_dns_rebinding_protection, while the Starlette routes /, /sse, and /messages/ have no authentication and the service binds to 0.0.0.0 by default. A network attacker can directly reach execute_sql, or can use DNS rebinding to make a victim's browser relay same-origin requests to a locally bound service, and supply a query that reaches cursor.execute(query). This allows unauthenticated disclosure and modification of the configured database; when the MySQL account has FILE privileges, the same access can read or write server files and may enable code execution. The default stdio transport is not affected. This issue is fixed in 0.4.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-59971)

Affected packages:

- `mysql-mcp-server < 0.4.2`

Patched in:

- `mysql-mcp-server 0.4.2`

Source: https://osv.dev/vulnerability/GHSA-rqfv-2mw9-78g2