Bug 2468433 (CVE-2026-6667)

Summary: CVE-2026-6667 PgBouncer: PgBouncer: Denial of Service via improper authorization for KILL_CLIENT command
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in PgBouncer. An improper authorization check in the KILL_CLIENT administration command allows any user with access to the administration console to terminate client connections. This can lead to a Denial of Service (DoS) for affected clients, as the system fails to restrict this command to authorized administrators.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2477911, 2477912    
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Description OSIDB Bzimport 2026-05-09 02:01:28 UTC
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.