What is CVE-2026-85620?

CVE-2026-85620 is a high-severity vulnerability, classified under Incorrect Authorization. CVSS score: 8.6/10. Published 2026-09-04.

How severe is CVE-2026-85620?

High severity. CVSS v3 base score is 8.6 out of 10.

CVE-2026-85620

CVE-2026-85620

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.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com
disclosure@vulncheck.com

Frequently asked questions

What is CVE-2026-85620?: CVE-2026-85620 is a high-severity vulnerability, classified under Incorrect Authorization. CVSS score: 8.6/10. Published 2026-09-04.
How severe is CVE-2026-85620?: High severity. CVSS v3 base score is 8.6 out of 10.