CVE-2026-6667

FAUCET Score

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 been correct to allow only users listed in the admin_users parameter.

First published: May 9, 2026Last modified: May 11, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 1.25.2CPE matchmatch criteria	cpe:2.3:a:pgbouncer:pgbouncer::::::::

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

LOW

Exploitability Score

2.8

Impact Score

1.4

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.29%

Probability of exploitation in next 30 days

EPSS Percentile

20.9%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

This CVE's current EPSS score of 0.0029 is in the 27th percentile among its peer group of 21,951 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia msrc

Product: 21328-17084Fixed in: 1.25.2-1

microsoftpatch availablevia msrc

Product: azl3 pgbouncer 1.25.1-1 on Azure Linux 3.0Fixed in: 1.25.2-1

Vendor Advisories (1)

microsoft2026-May/CVE-2026-6667Moderate

PgBouncer missing authorization check in KILL_CLIENT admin command

May 7, 2026

References

pgbouncer.org / changelog.html

Release Notes