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.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://aws.amazon.com/security/security-bulletins/2026-103-aws/
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/awslabs/mcp/releases?page=2#release-2026.07.20260702161703
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/awslabs/mcp/security/advisories/GHSA-x25m-ph3m-3r9q
ff89ba41-3aa1-4d27-914a-91399e9639e5