CVE-2026-44477— CloudNativePG: Metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE
Possible ATT&CK Techniques 3AI
T1610 · Deploy Container T1059.001 · PowerShell T1068 · Exploitation for Privilege EscalationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| cloudnative-pg | cloudnative-pg | < 1.28.3 | affected |
>= 1.29.0, < 1.29.1 | affected |
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I. Basic Information for CVE-2026-44477
Vulnerability Information
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Vulnerability Title
CloudNativePG: Metrics exporter allows privilege escalation to PostgreSQL superuser and OS RCE
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
带着不必要的权限执行
Source: NVD (National Vulnerability Database)
Vulnerability Title
CloudNativePG 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CloudNativePG是CloudNativePG开源的一个在Kubernetes上管理PostgreSQL数据库全生命周期的开源平台。 CloudNativePG 1.29.1之前版本和1.28.3之前版本存在代码问题漏洞，该漏洞源于指标导出器通过pod本地Unix套接字以postgres超级用户身份打开PostgreSQL连接，然后使用SET ROLE pg_monitor降级会话，但session_user仍为postgres，攻击者可在抓取会话中调用RESET ROLE恢复超级用户权限，并使用
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| cloudnative-pg | cloudnative-pg | < 1.28.3 | - |
II. Public POCs for CVE-2026-44477
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-44477 (1)
Vendor Advisories for CVE-2026-44477 (1)
IV. Related Vulnerabilities
Same weakness: CWE-250
V. Comments for CVE-2026-44477
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