AWS MySQL MCP Server up to 1.0.21 Mutable SQL Detector information disclosure

Summaryinfo

A vulnerability marked as problematic has been reported in AWS MySQL MCP Server up to 1.0.21. This impacts an unknown function of the component Mutable SQL Detector. This manipulation causes information disclosure. The identification of this vulnerability is CVE-2026-85788. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in AWS MySQL MCP Server up to 1.0.21. It has been declared as problematic. Affected by this vulnerability is an unknown code of the component Mutable SQL Detector. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

Incomplete list of disallowed inputs in the mutable SQL detector component in Amazon awslabs mysql-mcp-server might allow context-dependent actors to bypass the read-only enforcement gate and reach file-read and file-write SQL sinks via SQL inline comments that the regex engine does not treat as whitespace. To remediate this issue, users should upgrade to version 1.0.23.

It is possible to read the advisory at aws.amazon.com. This vulnerability is known as CVE-2026-85788 since 09/04/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 1.0.23 eliminates this vulnerability.

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Productinfo

Type

• Database Software

Vendor

• AWS

Name

• MySQL MCP Server

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.0.10
• 1.0.11
• 1.0.12
• 1.0.13
• 1.0.14
• 1.0.15
• 1.0.16
• 1.0.17
• 1.0.18
• 1.0.19
• 1.0.20
• 1.0.21

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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