CVE-2026-44477

critical

Published 2026-05-11 · Modified 2026-06-03

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CVSS v3

9.9

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v4 NEW

9.4

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

VIR risk

9.9

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.

Predictions

Exploit likelihood

100%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/cloudnative-pg/cloudnative-pg	`<1.28.3`	`1.28.3`
Go	github.com/cloudnative-pg/cloudnative-pg	`>=1.29.0,<1.29.1`	`1.29.1`
GO	github.com/cloudnative-pg/cloudnative-pg	`>= 1.29.0, < 1.29.1`	`1.29.1`
GO	github.com/cloudnative-pg/cloudnative-pg	`< 1.28.3`	`1.28.3`

Application impact

Vendor	Product	Versions	Fixed
linuxfoundation	cloudnativepg	`{"endExcluding":"1.28.3"}`	`1.28.3`
linuxfoundation	cloudnativepg	`{"startIncluding":"1.29.0","endExcluding":"1.29.1"}`	`1.29.1`

References

CWEs

CWE-250 CWE-271 CWE-426

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.