CVE-2026-6667

PgBouncer missing authorization check in KILL_CLIENT admin command

At a glance

Severity: MEDIUM 4.3
EPSS: EPSS 0.29 % · percentile 21 (2026-10-27)
State: PUBLISHED
Published: 2026-05-09
Updated: 2026-05-11
Assigner: PostgreSQL
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	PostgreSQL
CVSS 3.1	MEDIUM 4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	NVD · f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Secondary)

Weaknesses (CWE)

CWE-862

European references

ENISA EUVD · EUVD-2026-28879
GCVE · GCVE-0-2026-6667

CERT-FR advisories

CERTFR-2026-AVI-0588 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr
CERTFR-2026-AVI-0559 — Multiples vulnérabilités dans PostgreSQL PgBouncer · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:pgbouncer:pgbouncer:*:*:*:*:*:*:*:* < 1.25.2

Affected products

Product	Versions
PgBouncer	affected 0 < 1.25.2

References

https://www.pgbouncer.org/changelog.html#pgbouncer-125x

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD