SQL Injection Vulnerability in Amazon's Postgres MCP Server

CVE-2026-85787

What is CVE-2026-85787?

CVE-2026-85787 refers to a SQL injection vulnerability found in Amazon's Postgres MCP Server prior to version 1.1.7. This software is part of Amazon's managed services, designed to facilitate cloud-based data management using PostgreSQL. The vulnerability arises from an incomplete filtering of disallowed inputs in the SQL validation component, enabling an unauthenticated attacker to craft SQL queries that could manipulate data outside of intended read-only operations. This flaw poses potential risks by allowing unauthorized modifications to the database, which could disrupt service integrity and compromise data confidentiality.

Potential impact of CVE-2026-85787

1. Data Integrity Breach: Exploitation of this vulnerability could allow malicious actors to alter or delete critical data, undermining the reliability of stored information and leading to significant operational disruptions for organizations relying on this data.

2. Unauthorized Access: The ability for attackers to inject SQL commands could facilitate unauthorized access to sensitive information, potentially exposing confidential data to unauthorized users and leading to significant privacy and compliance violations.

3. Increased Attack Surface: By allowing unvalidated inputs, this vulnerability could open doors to additional attack vectors, enabling further exploits against the server or connected systems, thereby expanding the overall risk landscape for the organization.

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