VULNERABILITY INTELLIGENCE

CVE-2026-44477

CVSS score9.9 CRITICAL
EPSS probability0.48%
CISA KEVNot currently listed
Published2026-05-28
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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.

Weakness classification

  • security-advisories@github.com: CWE-250
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-250

Primary references