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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
cloudnative-pg cloudnative-pg
< 1.28.3affected>= 1.29.0, < 1.29.1affected
References
- https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39 ↗
- https://github.com/cloudnative-pg/cloudnative-pg/pull/10576 ↗
- 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 ↗