CVE-2026-6667 PgBouncer missing authorization check in KILL_CLIENT admin command
Attackers with admin console access can disconnect arbitrary clients via the KILL_CLIENT command, causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-6667?
CVE-2026-6667 is a medium-severity missing authorization vulnerability in PgBouncer, published on 9 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-6667?
1 open source package ship an affected version, including pgbouncer. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pgbouncer Bitnami | All versions | 1.25.2 |
Products include Pgbouncer Pgbouncer.
How do I fix CVE-2026-6667?
Upgrade pgbouncer to 1.25.2 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-6667 being exploited?
There is no known exploitation of CVE-2026-6667 in the wild and no public exploit code.
Other vulnerabilities in PgBouncer
Sources
Also known as AZL-86240, BIT-pgbouncer-2026-6667, CLEANSTART-2026-KP55848, DEBIAN-CVE-2026-6667, GHSA-gc77-jrv9-6fjp, MINI-cr3h-9hgx-hr78 and 1 more.