---
cve: "CVE-2026-44477"
severity: "CRITICAL"
cvss: 9.4
epss: "0.5%"
vendor: "cloudnative-pg"
kev: false
exploited: false
published: "2026-05-28 17:16:30"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-30T06:44:22+02:00"
---

# CVE-2026-44477

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- d0ce8ac4a6e58154520e8614025bfb1f2aa216f1 (Commit)
- a4060c152630c9e8958e17d3d23f26b4eb30b69f (Commit)

## Referenzen

- <https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39>
- <https://github.com/cloudnative-pg/cloudnative-pg/pull/10576>
- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-44477) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_