CVE-2026-6667
PgBouncer missing authorization check in KILL_CLIENT admin command
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
PgBouncer missing authorization check in KILL_CLIENT admin command
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.
- Record
CVE-2026-6667- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
EUVDEUVD-2026-28879
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.
- Record
EUVD-2026-28879- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gc77-jrv9-6fjp
PgBouncer before 1.25.2 did not perform an appropriate authorization check for the KILL_CLIENT...
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.
- Record
GHSA-gc77-jrv9-6fjp- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-6667- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-862
- Updated
- 2026-11-02
OSVDEBIAN-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 been correct to allow only users listed in the admin_users parameter.
- Record
DEBIAN-CVE-2026-6667- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVUBUNTU-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 been correct to allow only users listed in the admin_users parameter.
- Record
UBUNTU-CVE-2026-6667- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVAZL-86240 No score
CVE-2026-6667 affecting package pgbouncer for versions less than 1.25.2-1
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.
- Record
AZL-86240- Updated
- 2026-11-02
OSVBIT-pgbouncer-2026-6667 No score
PgBouncer missing authorization check in KILL_CLIENT admin command
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.
- Record
BIT-pgbouncer-2026-6667- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pgbouncerAzure Linux:3 |
before 1.25.2-1 | 1.25.2-1 |
pgbouncerBitnami |
before 1.25.2 | 1.25.2 |
pgbouncerDebian:12 |
All versions, plus listed versions 1.18.0-11.18.0-1+deb12u11.19.0-11.19.1-11.20.0-1 Show 17 moreShow less1.20.1-11.21.0-11.22.0-11.22.1-11.23.0-11.23.1-11.24.0-21.24.0-31.24.1-11.25.0-11.25.0-21.25.1-11.25.2-11.26.0-11.26.0-21.26.0-31.26.0-4 |
None known |
pgbouncerDebian:13 |
before 1.24.1-1+deb13u2, plus listed versions 1.24.1-11.24.1-1+deb13u1 |
1.24.1-1+deb13u2 |
pgbouncerDebian:14 |
before 1.25.2-1, plus listed versions 1.24.1-11.25.0-11.25.0-21.25.1-1 |
1.25.2-1 |
pgbouncerUbuntu:16.04:LTS |
All versions, plus listed versions 1.5.5-11.6.1-11.7-1 |
None known |
pgbouncerUbuntu:18.04:LTS |
All versions, plus listed versions 1.7.2-3build11.7.2-65-g2b8e6cf-11.8.1-11.8.1-1build1 |
None known |
pgbouncerUbuntu:20.04:LTS |
All versions, plus listed versions 1.10.0-11.10.0-1build11.11.0-11.12.0-21.12.0-3 |
None known |
pgbouncerUbuntu:22.04:LTS |
All versions, plus listed versions 1.15.0-11.16.1-1ubuntu1 |
None known |
pgbouncerUbuntu:24.04:LTS |
All versions, plus listed versions 1.20.0-11.21.0-11.22.0-11.22.0-1build11.22.0-1build31.22.0-1build4 |
None known |
pgbouncerUbuntu:25.10 |
All versions, plus listed versions 1.24.0-31.24.1-1 |
None known |
pgbouncerUbuntu:26.10 |
All versions, plus listed versions 1.25.1-11.25.2-11.25.2-1ubuntu1 |
None known |
pgbouncerUbuntu:26.04:LTS |
All versions, plus listed versions 1.24.1-11.25.0-21.25.1-1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-6667 is a medium vulnerability (CVSS 4.3) in Pgbouncer, published May 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in pgbouncer 1.25.2-1.