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Supabase MCP read-only mode bypasses database security

By PulseAugur Editorial · [1 sources] ·

A developer explored the "read-only" setting for Supabase's MCP (Multi-Channel Platform) to understand its security implications for AI agents. The investigation revealed that the read-only mode utilizes a PostgreSQL role named `supabase_read_only_user`, which bypasses Row Level Security (RLS). The author created a similar role to test data access, finding that it could read specific tables like `invoices` and `tenants` but not perform write or drop operations. AI

IMPACT Clarifies security implications for developers connecting AI agents to databases, potentially influencing best practices for data access control.

RANK_REASON The item details a specific feature's behavior and security implications within a development platform, rather than a new product release or major industry event.

Read on dev.to — MCP tag →

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

Supabase MCP read-only mode bypasses database security

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3 / 100
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Tool
The item details a specific feature's behavior and security implications within a development platform, rather than a new product release or major industry event.
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Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
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High
Clearly on-topic for AI-industry coverage.
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Same-day
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Full methodology in our editorial standards.

COVERAGE [1]

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

    Before You Give an AI Agent a Key: What Supabase MCP "Read-Only" Really Means, and a Data Inventory Page

    <p>You can connect an AI agent straight to your Supabase project through MCP. The connection URL has three knobs that narrow what you hand over, and one of them is called read-only. I wanted to know what each knob changes, and what "read-only" means inside the database. So I flip…

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