CVE-2026-85788

Incomplete list of disallowed inputs in awslabs mysql-mcp-server

State: Published
Severity: 5.7 Medium
Published: Sep 9, 2026
Updated: Sep 9, 2026
Reserved: Sep 4, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	5.7 Medium	CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	AMZN
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N	AMZN

Weaknesses

CWE-184 Incomplete list of disallowed inputs

Affected Products

Product	Versions
AWS Labs MySQL MCP ServerAWS	1.0.21 and earlierAffected

References

https://aws.amazon.com/security/security-bulletins/2026-103-aws/vendor-advisory
https://github.com/awslabs/mcp/releases?page=2#release-2026.07.20260702161703patch
https://github.com/awslabs/mcp/security/advisories/GHSA-x25m-ph3m-3r9qthird-party-advisory

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