---
title: "CVE-2026-59971: MySQL MCP Server - DNS Rebinding"
description: "MySQL MCP Server < 0.4.2 contains a DNS rebinding and unauthenticated access vulnerability caused by insecure SseServerTransport configuration and lack of authentication on key routes, letting network attackers disclose and modify database contents and potentially execute code if FILE privileges exist, exploit requires network access and victim browser interaction."
url: https://panop.io/threat-heartbeat/CVE-2026-59971/
---

# CVE-2026-59971 MySQL MCP Server - DNS Rebinding

MySQL MCP Server < 0.4.2 contains a DNS rebinding and unauthenticated access vulnerability caused by insecure SseServerTransport configuration and lack of authentication on key routes, letting network attackers disclose and modify database contents and potentially execute code if FILE privileges exist, exploit requires network access and victim browser interaction.

CVSS base score 10.0 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.42% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-59971)

## Details

Type

DNS Rebinding

Impact

Information Disclosure, Data Tampering, Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Published

15 September 2026

Updated

15 October 2026

Weakness

[CWE-306](https://cwe.mitre.org/data/definitions/306.html)

## Vendor fix

Update to version 0.4.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-59971](https://nvd.nist.gov/vuln/detail/CVE-2026-59971)
- [https://github.com/designcomputer/mysql\_mcp\_server/commit/a96549f4a4d65443fd6e9c7f2324fba9a5c80a82](https://github.com/designcomputer/mysql_mcp_server/commit/a96549f4a4d65443fd6e9c7f2324fba9a5c80a82)
- [https://github.com/designcomputer/mysql\_mcp\_server/issues/92](https://github.com/designcomputer/mysql_mcp_server/issues/92)
- [https://github.com/designcomputer/mysql\_mcp\_server/releases/tag/v0.4.2](https://github.com/designcomputer/mysql_mcp_server/releases/tag/v0.4.2)
- [https://github.com/designcomputer/mysql\_mcp\_server/security/advisories/GHSA-rqfv-2mw9-78g2](https://github.com/designcomputer/mysql_mcp_server/security/advisories/GHSA-rqfv-2mw9-78g2)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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