CVE-2026-6667: Missing Authorization in PgBouncer
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.
AI Analysis
Technical Summary
PgBouncer before version 1.25.2 does not enforce appropriate authorization for the KILL_CLIENT administrative command. While access to the administration console requires authorization, all authorized users could run KILL_CLIENT regardless of whether they were listed in the admin_users parameter. The intended behavior is to restrict this command to only those users explicitly configured as admin_users. This flaw can lead to denial of service by terminating client connections without proper permission.
Potential Impact
The vulnerability allows any user with access to the PgBouncer administration console to forcibly terminate client connections using the KILL_CLIENT command. This can disrupt service availability but does not affect data confidentiality or integrity. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the PgBouncer administration console to trusted users only. Monitor vendor communications for updates regarding a patch or official remediation.
CVE-2026-6667: Missing Authorization in PgBouncer
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
PgBouncer before version 1.25.2 does not enforce appropriate authorization for the KILL_CLIENT administrative command. While access to the administration console requires authorization, all authorized users could run KILL_CLIENT regardless of whether they were listed in the admin_users parameter. The intended behavior is to restrict this command to only those users explicitly configured as admin_users. This flaw can lead to denial of service by terminating client connections without proper permission.
Potential Impact
The vulnerability allows any user with access to the PgBouncer administration console to forcibly terminate client connections using the KILL_CLIENT command. This can disrupt service availability but does not affect data confidentiality or integrity. There are no known exploits in the wild as of the published date.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the PgBouncer administration console to trusted users only. Monitor vendor communications for updates regarding a patch or official remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-04-20T12:25:45.561Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fe8c5ccbff5d86108b6ab2
Added to database: 5/9/2026, 1:22:36 AM
Last enriched: 5/9/2026, 1:36:41 AM
Last updated: 5/9/2026, 2:43:39 AM
Views: 2
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