CVE-2026-16239: PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code

Overview

Severity

High (CVSS 8.8)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-14

EPSS Score

0.60% (percentile: 46.3%)

Affected Products (1)

Other

• 21725-17084

Revision History

• 2026-08-14: Information published.