9.9

CVE-2026-44477

CloudNativePG: Metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linuxfoundation ≫ Cloudnativepg SwPlatformkubernetes Version < 1.28.3
Linuxfoundation ≫ Cloudnativepg SwPlatformkubernetes Version >= 1.29.0 < 1.29.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.48% 0.378
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 9.9 3.1 6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
security-advisories@github.com 9.4 0 0
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
0b0ca135-0b70-47e7-9f44-1890c2a1c46c 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-250 Execution with Unnecessary Privileges

The product performs an operation at a privilege level that is higher than the minimum level required, which creates new weaknesses or amplifies the consequences of other weaknesses.

CWE-271 Privilege Dropping / Lowering Errors

The product does not drop privileges before passing control of a resource to an actor that does not have those privileges.

CWE-426 Untrusted Search Path

The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control.

https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-423p-g724-fr39
Vendor Advisory
Mitigation
https://github.com/cloudnative-pg/cloudnative-pg/pull/10576
Patch
Issue Tracking
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