What is CVE-2026-6667?

CVE-2026-6667 is a medium-severity vulnerability in Pgbouncer, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-05-09.

How severe is CVE-2026-6667?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Pgbouncer

CVE-2026-6667

PgBouncer before 1.25.2 did not perform an appropriate authorization check for the KILL_CLIENT admin command. All users with access to the administration console (which itself requires authorization) could run this command. It would have b…

Vulnerability class: Broken Access Control

EPSS: 0.000 (2.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Pgbouncer
N/a Pgbouncer — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Release Notes)

Frequently asked questions

What is CVE-2026-6667?: CVE-2026-6667 is a medium-severity vulnerability in Pgbouncer, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-05-09.
How severe is CVE-2026-6667?: Medium severity. CVSS v3 base score is 4.3 out of 10.