EUVD-2026-71748
GHSA-f4f4-39r8-8gj4
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/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
Network-reachable, no attacker privileges, but authenticated user must trigger the interaction (UI:R); integrity-only impact with no confidentiality or availability effect.
Primary rating from Vendor (AMZN).
CVSS VectorVendor: AMZN
Lifecycle Timeline
3DescriptionCVE.org
An incomplete list of disallowed inputs in the SQL validation component in Amazon awslabs postgres-mcp-server before version 1.1.7 might allow an unauthenticated actor to modify data beyond the read-only scope by placing crafted SQL into the content that is submitted when an authenticated user interacts with the MCP server.
To remediate this issue, users should upgrade to version 1.1.7 or above.
Articles & Coverage 1
AnalysisAI
Incomplete SQL validation denylist in Amazon awslabs postgres-mcp-server before 1.1.7 allows an unauthenticated attacker to bypass read-only enforcement and perform write operations against a PostgreSQL database by embedding crafted SQL in content processed when an authenticated user interacts with the MCP server. The vulnerability (CWE-184) exploits the incomplete list of disallowed SQL constructs, effectively turning user-triggered MCP interactions into a vector for unauthorized data modification with high integrity impact (VI:H) and no confidentiality or availability effect. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two sequential conditions: first, the attacker must be able to pre-position crafted SQL content in a source that the postgres-mcp-server will later read and process (e.g., a database table, a tool-response payload, or any input channel feeding the MCP server); second, an authenticated user must trigger an MCP interaction that causes the server to process that attacker-controlled content. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N) scores 7.1, reflecting network-reachable exploitation with no attacker privileges required but mandatory authenticated-user interaction. … 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 awslabs.postgres-mcp-server version 1.1.7 or later via pip: 'pip install --upgrade awslabs.postgres-mcp-server'. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running postgres-mcp-server and document current versions in use. …
Sign in for detailed remediation steps and compensating controls.
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External POC / Exploit Code
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