CVE-2026-107350: Authentication bypass via second StartupMessage during SCRAM authentication in PgBouncer

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-Oct

Released

2026-10-16

EPSS Score

0.36% (percentile: 28.3%)

Affected Products (1)

Other

• 21934-17084

Revision History

• 2026-10-16: Information published.