EUVD-2026-75104Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Local vector for MCP server deployment; AC:H for inline-comment regex bypass; I:L because file-write requires the MySQL FILE privilege not granted by default.
Primary rating from Vendor (AMZN).
CVSS VectorVendor: AMZN
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Read-only enforcement bypass in Amazon awslabs mysql-mcp-server (versions ≤ 1.0.21) enables context-dependent actors - including AI models or users interacting via the Model Context Protocol - to reach file-read and file-write SQL execution paths that the mutable SQL detector is designed to gate. The detector relies on a regex engine that does not treat SQL inline comments as whitespace, allowing crafted queries containing comment tokens to pass the allowlist check while MySQL parses and executes the full underlying write or file-access statement. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The actor must be able to submit SQL queries through the mysql-mcp-server MCP interface - this includes AI models connected to the server or users who can invoke MCP tool calls. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.7 (Medium) reflects meaningful real-world constraints: a local attack vector (AV:L), specific attack prerequisites (AT:P), and passive user interaction (UI:P) all limit opportunistic mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to mysql-mcp-server version 1.0.23 or later, as confirmed by the AWS security bulletin (https://aws.amazon.com/security/security-bulletins/2026-103-aws/) and the GitHub release page (https://github.com/awslabs/mcp/releases). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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