Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Cloudnativepg | < 1.28.3 |
Related Weaknesses (CWE)
References
- https://github.com/cloudnative-pg/cloudnative-pg/pull/10576Issue TrackingPatch
- https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-gMitigationVendor Advisory
- 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
FAQ
What is CVE-2026-44477?
CVE-2026-44477 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 th...
How severe is CVE-2026-44477?
CVE-2026-44477 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-44477?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Cloudnativepg.