CVE-2026-44477

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 v3 9.9 CRITICAL

9.9^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.1 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

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
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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:linuxfoundation:cloudnativepg::::::kubernetes::*
	cpe:2.3:a:linuxfoundation:cloudnativepg::::::kubernetes::*

History

No history.

Information

Published : 2026-05-28 17:16

Updated : 2026-07-15 02:21

NVD link : CVE-2026-44477

Mitre link : CVE-2026-44477

CVE.ORG link : CVE-2026-44477

JSON object : View

Products Affected

linuxfoundation

cloudnativepg

CWE

CWE-250

Execution with Unnecessary Privileges

CWE-271

Privilege Dropping / Lowering Errors

CWE-426

Untrusted Search Path

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This vulnerability is fixed in 1.29.1 and 1.28.3."}], "lastModified": "2026-07-15T02:21:54.357", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:linuxfoundation:cloudnativepg:*:*:*:*:*:kubernetes:*:*", "vulnerable": true, "matchCriteriaId": "CA7ACE2F-02E6-44A2-9794-999DDF90E7F7", "versionEndExcluding": "1.28.3"}, {"criteria": "cpe:2.3:a:linuxfoundation:cloudnativepg:*:*:*:*:*:kubernetes:*:*", "vulnerable": true, "matchCriteriaId": "9FEA912C-AF0C-4C91-A529-BEDFB04E8239", "versionEndExcluding": "1.29.1", "versionStartIncluding": "1.29.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}