CVE-2026-6667
PgBouncer missing authorization check in KILL_CLIENT admin command
Description
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.
INFO
Published Date :
May 9, 2026, 1:16 a.m.
Last Modified :
May 14, 2026, 6:49 p.m.
Remotely Exploit :
No
Source :
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 |
Solution
- Update PgBouncer to version 1.25.2 or later.
- Configure admin_users to restrict command access.
- Ensure administration console access is properly secured.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-6667.
| URL | Resource |
|---|---|
| https://www.pgbouncer.org/changelog.html#pgbouncer-125x | Release Notes |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-6667 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-6667
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-6667 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-6667 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
May. 14, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:pgbouncer:pgbouncer:*:*:*:*:*:*:*:* versions up to (excluding) 1.25.2 Added Reference Type PostgreSQL: https://www.pgbouncer.org/changelog.html#pgbouncer-125x Types: Release Notes -
New CVE Received by f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
May. 09, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Added CWE CWE-862 Added Reference https://www.pgbouncer.org/changelog.html#pgbouncer-125x