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.
References
| Link | Resource |
|---|---|
| https://github.com/cloudnative-pg/cloudnative-pg/pull/10576 | Issue Tracking Patch |
| https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39 | Mitigation Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
03 Jun 2026, 18:56
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/cloudnative-pg/cloudnative-pg/pull/10576 - Issue Tracking, Patch | |
| References | () https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39 - Mitigation, Vendor Advisory | |
| CPE | cpe:2.3:a:linuxfoundation:cloudnativepg:*:*:*:*:*:kubernetes:*:* | |
| First Time |
Linuxfoundation
Linuxfoundation cloudnativepg |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 9.9 |
28 May 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-28 17:16
Updated : 2026-06-03 18:56
NVD link : CVE-2026-44477
Mitre link : CVE-2026-44477
CVE.ORG link : CVE-2026-44477
JSON object : View
Products Affected
linuxfoundation
- cloudnativepg