Published Nov 12, 2026Sources checked Nov 12, 2026
5.4MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-16237 and is rated Medium severity with a CVSS score of 5.4. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Nov 14, 2026
Release Notes
CISA KEVNot listedBased on the latest collected catalog
EPSSUnavailableNo current score collected
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-16237?
Improper protection in PostgreSQL INSERT ... ON CONFLICT on auto-updatable views allows an attacker having INSERT and UPDATE privileges on the view to read and modify every row in the view's base table, via iterated INSERT ...
ON CONFLICT DO UPDATE. This bypasses the view's WHERE condition, whether or not the view is a security_barrier view.
Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.