PT-2026-39226 · Pgbouncer · Pgbouncer

Johannes Möller · Published 2026-05-09 · Updated 2026-05-09 · CVE-2026-6664

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

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

Description An integer overflow in the network packet parsing code allows an unauthenticated remote attacker to bypass a boundary check. By sending a malformed SCRAM authentication packet, the attacker can cause the system to crash, resulting in a denial of service.

Recommendations Update to version 1.25.2.

Fix

DoS

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2026-6664

Affected Products

Pgbouncer

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-6664 · Security Note
• https://pgbouncer.org/changelog.html#pgbouncer-125x · Note
• https://twitter.com/VulmonFeeds/status/2053067864093892903 · Twitter Post