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CVE-2026-6667

PgBouncer missing authorization check in KILL_CLIENT admin command

MEDIUM
4.3
CVSS Score
Published: May 9, 2026 at 12:43 AM UTC
Updated: July 24, 2026 at 08:23 AM UTC
1 product affected across 1 vendorPgbouncer

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Pgbouncer· Pgbouncer
95%
v < 1.25.2
Affected range stops below 1.25.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Release Notes
Source: cverecord
https://www.pgbouncer.org/changelog.html#pgbouncer-125x

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.3MEDIUMPostgreSQL
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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