CVE-2026-85620

Postgres MCP Pro 0.3.0 Restricted-Mode Bypass via FROM-Clause Function

Published Sep 4, 2026 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
Description
Postgres MCP Pro 0.3.0 contains a restricted-mode bypass vulnerability where function-name validation is not applied to RangeFunction nodes in FROM clauses. Attackers can execute file-reading functions like pg_read_file through FROM-clause syntax to read arbitrary files despite restricted-mode protections.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Crystaldba
Crystaldba postgres-mcp
Vendors & Products Crystaldba
Crystaldba postgres-mcp
Type Values Removed Values Added
Description Postgres MCP Pro 0.3.0 contains a restricted-mode bypass vulnerability where function-name validation is not applied to RangeFunction nodes in FROM clauses. Attackers can execute file-reading functions like pg_read_file through FROM-clause syntax to read arbitrary files despite restricted-mode protections.
Title Postgres MCP Pro 0.3.0 Restricted-Mode Bypass via FROM-Clause Function
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 14, 2026, 7:33 PM
Reserved
Sep 4, 2026, 11:03 AM
Status
Awaiting Analysis
Published
Sep 4, 2026, 3:17 PM
Modified
Sep 24, 2026, 8:44 PM