CVE-2026-87911

An OS command injection weakness in the read-only enforcement of the SQL validation component in Amazon awslabs postgres-mcp-server before 1.1.7 might allow an unauthenticated actor to execute operating system commands on the host of a self-managed PostgreSQL server by placing a crafted COPY ... TO PROGRAM statement into content that is processed when an authenticated user interacts with the MCP server in its default read-only mode. To remediate this issue, users should upgrade to version 1.1.7 or later.

CVSS v3 9.6 CRITICAL

9.6^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.8 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-104-aws/
https://github.com/awslabs/mcp/security/advisories/GHSA-fph8-pg5w-78fv
https://pypi.org/project/awslabs.postgres-mcp-server/1.1.7/

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-09 20:21

Updated : 2026-09-10 15:53

NVD link : CVE-2026-87911

Mitre link : CVE-2026-87911

CVE.ORG link : CVE-2026-87911

JSON object : View

Products Affected

No product.

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-184

Incomplete List of Disallowed Inputs

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