NULL pointer dereference in Pgbouncer

CVE-2026-6666

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.

EPSS: 0.000 (4.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Pgbouncer
N/a Pgbouncer — versions 0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Release Notes)

Frequently asked questions

What is CVE-2026-6666?: CVE-2026-6666 is a medium-severity vulnerability in Pgbouncer, classified under NULL Pointer Dereference. CVSS score: 5.9/10. Published 2026-05-09.
How severe is CVE-2026-6666?: Medium severity. CVSS v3 base score is 5.9 out of 10.