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AWS Postgres MCP Server Vulnerability Patched in Version 1.1.7

By PulseAugur Editorial · [1 sources] ·

A security vulnerability, identified as CVE-2026-85787, has been discovered in AWS Labs' Postgres MCP server. The vulnerability stems from an incomplete keyword denylist in the `mutable_sql_detector.py` script, which allowed SQL commands to bypass read-only configurations. This could enable attackers to mutate data or alter session states, even when the server was intended to be read-only. AWS has released patches, with versions 1.1.7 and later addressing the issue by strengthening the denylist and adding specific pattern blocks. AI

IMPACT Mitigates a specific security risk for users of the AWS Labs Postgres MCP server, preventing unauthorized data mutation.

RANK_REASON Security patch for a specific software package, not a core AI model release.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

AWS Postgres MCP Server Vulnerability Patched in Version 1.1.7

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15 / 100
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Tool
Security patch for a specific software package, not a core AI model release.
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product, safety
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Standard
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COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · Michael Kantor ·

    CVE-2026-85787: AWS postgres MCP read-only denylist missed set_config()

    <p><em>Originally published at <a href="https://hol.org/blog/cve-2026-85787-awslabs-postgres-mcp-sql-denylist-bypass" rel="noopener noreferrer">HOL</a></em></p> <p><strong>Read-only mode on AWS Labs' Postgres MCP server was enforced by a keyword denylist that missed several Postg…

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