CVE-2026-18408: PostgreSQL psql \unrestrict lets superuser of pg_dump origin server execute arbitrary code in psql client

Overview

Severity

High (CVSS 8.8)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Aug

Released

2026-08-14

EPSS Score

0.53% (percentile: 42.4%)

Affected Products (1)

Other

• 21725-17084

Revision History

• 2026-08-14: Information published.