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CVE-2026-44477

Linuxfoundation Cloudnativepg privilege escalation

9.9 CRITICALEPSS 0.52%
  1. Published28 May 2026

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Linuxfoundation Cloudnativepg≥ 1.29.0 < 1.29.1 · < 1.28.3

Remediation

Fixed in
Linuxfoundation Cloudnativepg≥ 1.29.1

References

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Frequently asked

Is CVE-2026-44477 being actively exploited?

CVE-2026-44477 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.52%.

How severe is CVE-2026-44477?

CVE-2026-44477 has a CVSS 3.1 base score of 9.9, rated critical. EPSS estimates a 0.52% probability of exploitation.

Which products are affected by CVE-2026-44477?

Affected products include Linuxfoundation Cloudnativepg.

How do I fix CVE-2026-44477?

Upgrade affected software to a fixed version, for example Linuxfoundation Cloudnativepg 1.29.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-44477 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.