# CVE-2026-44477

## Summary

- **CVE ID:** CVE-2026-44477
- **Severity:** CRITICAL
- **CVSS Score:** 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)
- **CWE:** CWE-250, CWE-271, CWE-426
- **Published:** May 28, 2026
- **Last Modified:** Jul 15, 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.

## Affected Products

- cloudnative-pg — cloudnative-pg (< 1.28.3)
- cloudnative-pg — cloudnative-pg (>= 1.29.0, < 1.29.1)

## References

- [CNA](https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39)
- [CNA](https://github.com/cloudnative-pg/cloudnative-pg/pull/10576)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-44477)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2482763)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44477.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.48%
- **EPSS Percentile:** 39.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._