CVE-2026-44477
Severity CVSS v4.0:
CRITICAL
Type:
Unavailable / Other
Publication date:
28/05/2026
Last modified:
30/06/2026
Description
CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.29.1 and 1.28.3, the CloudNativePG metrics exporter opens its PostgreSQL connection as the postgres superuser via the pod-local Unix socket, then demotes the session with SET ROLE pg_monitor. SET ROLE changes only current_user; session_user remains postgres. Any SQL expression evaluated inside the scrape session can invoke RESET ROLE to recover real superuser privileges, then use COPY ... TO PROGRAM to spawn an OS-level subprocess as the postgres user inside the primary pod. The READ ONLY transaction flag does not block this; it gates writes to database state, not external processes. This vulnerability is fixed in 1.29.1 and 1.28.3.
Impact
Base Score 4.0
9.40
Severity 4.0
CRITICAL
Base Score 3.x
9.90
Severity 3.x
CRITICAL
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:linuxfoundation:cloudnativepg:*:*:*:*:*:kubernetes:*:* | 1.28.3 (excluding) | |
| cpe:2.3:a:linuxfoundation:cloudnativepg:*:*:*:*:*:kubernetes:*:* | 1.29.0 (including) | 1.29.1 (excluding) |
To consult the complete list of CPE names with products and versions, see this page
References to Advisories, Solutions, and Tools
- https://github.com/cloudnative-pg/cloudnative-pg/pull/10576
- https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39
- https://access.redhat.com/security/cve/CVE-2026-44477
- https://bugzilla.redhat.com/show_bug.cgi?id=2482763
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44477.json