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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-423p-g724-fr39 CloudNativePG's metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 29 May 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 29 May 2026 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Cloudnative-pg
Cloudnative-pg cloudnative-pg
Vendors & Products Cloudnative-pg
Cloudnative-pg cloudnative-pg

Thu, 28 May 2026 17:00:00 +0000

Type Values Removed Values Added
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.
Title CloudNativePG: Metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE
Weaknesses CWE-250
CWE-271
CWE-426
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-28T17:28:44.136Z

Reserved: 2026-05-06T17:18:51.782Z

Link: CVE-2026-44477

cve-icon Vulnrichment

Updated: 2026-05-28T17:28:40.568Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-28T17:16:30.590

Modified: 2026-05-29T16:25:57.843

Link: CVE-2026-44477

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-29T15:48:20Z

Weaknesses