Published May 14, 2026Sources checked Nov 11, 2026
7.5HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-6479 and is rated High severity with a CVSS score of 7.5. 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: May 17, 2026
CBL-Mariner Releases
Vendor-listed releases
16.14-1
CISA KEVNot listedBased on the latest collected catalog
EPSS0.6%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-6479?
Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket.
Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.