CVE-2026-6666

PgBouncer crash in kill_pool_logins_server_error

CVE-2026-6666 is fixed in pgbouncer on 1 platform, first by DEBIAN-CVE-2026-6666, released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0037

31st percentile

A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
pgbouncer · Debian 13.5 (trixie)	1.24.1-1+deb13u2	DEBIAN-CVE-2026-6666	May 27, 2026
pgbouncer · Debian 14	1.25.2-1	DEBIAN-CVE-2026-6666	May 27, 2026

Details

Published
May 9, 2026
Weakness
NULL Pointer Dereference
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6666

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