CVE-2026-44477
CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments.
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/cloudnative-pg/cloudnative-pg | < 1.28.3 | 1.28.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Cloudnativepg | before 1.28.3 from 1.29.0 before 1.29.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-423p-g724-fr39
- https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39
- https://github.com/cloudnative-pg/cloudnative-pg/pull/10576
- https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.28.3
- https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.29.1
- https://nvd.nist.gov/vuln/detail/CVE-2026-44477
- 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