CVE intelligence

CVE-2026-6473

Vulnerability intelligence

Published May 14, 2026Sources checked Nov 11, 2026

8.8HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-6473 and is rated High severity with a CVSS score of 8.8. 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 19, 2026

CBL-Mariner Releases

Vendor-listed releases

16.14-1

CISA KEVNot listedBased on the latest collected catalog

EPSS1.0%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-6473?

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database.

In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Source: NVD