CVE-2026-87911: Aws Labs Postgres Mcp Server

Critical severity, CVSS 9.6. EPSS: 1.7% chance of exploitation in the next 30 days.

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.

Affected products

• Aws Aws Labs Postgres Mcp Server: before 1.1.7 (fixed in 1.1.7)

Published 2026-09-09. Last modified 2026-09-10.