CVE-2026-126199

pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, the bundled CLI and web clients classified query_database statements only by their first keyword before deciding whether to display a write confirmation. SELECT INTO, data-modifying common table expressions beginning with WITH, and EXPLAIN ANALYZE of a write were treated as reads and could execute without confirmation on an allow_writes connection. Read-only connections remain protected by PostgreSQL transaction access mode, and EXPLAIN without ANALYZE and SELECT FOR UPDATE remain classified as reads. This issue is fixed in 1.1.0.

• CWE-357

• https://github.com/pgEdge/pgedge-postgres-mcp/commit/310c02809891cfaee6e4891cd7bb9aa1d459575c
• https://github.com/pgEdge/pgedge-postgres-mcp/pull/233
• https://github.com/pgEdge/pgedge-postgres-mcp/releases/tag/v1.1.0
• https://github.com/pgEdge/pgedge-postgres-mcp/security/advisories/GHSA-5gmh-9683-hhq9

Published

Nov 12, 2026

Last Modified

Nov 12, 2026

Status

Awaiting Analysis

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