PT-2026-39227

CVE-2026-6665

Published

2026-05-08

Updated

2026-09-18

Description by

CVSS 3.1

9.8

Critical

MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions PgBouncer versions prior to 1.25.2

Description The SCRAM code fails to correctly check the return value of the strlcat() function when constructing the SCRAM client-final-message. A malicious backend can trigger a stack overflow by sending a SCRAM server-final-message containing a long nonce.

Recommendations Update to version 1.25.2 or later.

Exploitability

Fix

Impacts

Researchers

Vendors

Affected products

Weakness enumeration

CWE-121: Stack-based Buffer Overflow

Related identifiers

CVE-2026-6665

BDU:2026-06728