CVE-2026-44477

CRITICAL EPSS 31.3%
Published May 28, 20261mo ago · Modified Jun 17, 20262w ago
9.4 CVSS 4.0
Critical
Find Similar
Published May 28, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
9.4
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
31.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 3

CWE-250
CWE-271
CWE-426

Affected Products 2

VendorProductVersionRange
linuxfoundationcloudnativepg* <1.28.3
linuxfoundationcloudnativepg*≥1.29.0  –  <1.29.1

References 2

  • github.com https://github.com/cloudnative-pg/cloudnative-pg/pull/10576
    Issue TrackingPatch
  • github.com https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39
    MitigationVendor Advisory

Remediation

  • github.com https://github.com/cloudnative-pg/cloudnative-pg/pull/10576
    Issue TrackingPatch