CVE-2026-6478: PostgreSQL discloses MD5-hashed passwords via covert timing channel

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-16

EPSS Score

0.04% (percentile: 11.0%)

Affected Products (1)

Other

• 21340-17084

Revision History

• 2026-05-16: Information published.