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Back to active CVEs
Critical · CVSS 8.6CVE-2026-85620

Postgres MCP Pro 0.3.0 Restricted-Mode Bypass via FROM-Clause FunctionCVE-2026-85620

Answer in brief

CVE-2026-85620 records a Critical severity (CVSS 8.6) vulnerability in Postgres MCP Pro 0.3.0 Restricted-Mode Bypass via FROM-Clause Function. The current sources do not mark it as known exploited. The current feed maps crystaldba/postgres-mcp (generic), crystaldba/postgres-mcp (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 24, 2026Source checked Oct 25, 2026First seen by HOL Sep 4, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 8.6
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps crystaldba/postgres-mcp (generic), crystaldba/postgres-mcp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
crystaldba/postgres-mcpgeneric0Not reported
crystaldba/postgres-mcpgeneric>=0 <=0.3.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for crystaldba/postgres-mcp, crystaldba/postgres-mcp.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • FaveoSuite Faveo Helpdesk UnAuthController.php UnAuthController.resolve authorizationAlso CWE-863
  • BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft PagesAlso CWE-863

Record context

Vulnerability class
Tool Poisoning
EPSS
Not reported
CWE IDs
CWE-863
Source
CVE List V5
Source checked
Oct 25, 2026
References
4 linked sources
Open source record