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CVE-2026-55769— CloudNativePG: Overriding operators can lead to privilege escalation in CloudNativePG for SQL queries without a fixed `search_path`

Quick assessment

Affected
cloudnative-pg cloudnative-pg
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CloudNativePG 是一个用于在 Kubernetes 环境中管理 PostgreSQL 数据库的平台。在 1.28.4 和 1.29.2 版本之前，CloudNativePG 在 文件的 函数中打开超级用户连接时，未固定 。持有 DATABASE OWNER 角色的用户可以在公共 schema 中创建重载的内置运算符，并修改数据库或角色的 ，从而导致实例管理器的内省查询（例如 ）以 postgres 超级用户身份执行攻击者控制的函数。同样的信任问题也影响了直接的 调用点以及 安全定义器（SECURITY

CVSS 9.4 · Critical EPSS 0.54% · P43

Affected Version Matrix 2

VendorProduct Version RangeStatus
cloudnative-pg cloudnative-pg < 1.28.4 affected
>= 1.29.0, < 1.29.2 affected
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I. Basic Information for CVE-2026-55769

Vulnerability Information
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Vulnerability Title
CloudNativePG: Overriding operators can lead to privilege escalation in CloudNativePG for SQL queries without a fixed `search_path`
Source: CVE Program / CVE List V5
Vulnerability Description
CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.28.4 and 1.29.2, CloudNativePG opened superuser connections without pinning search_path in fillDefaultParameters in pkg/management/postgres/pool/profiles.go. A role holding DATABASE OWNER could create overloaded built-in operators in the public schema and change the database or role search_path, causing instance-manager introspection queries such as SELECT COUNT(*) > 0 FROM pg_catalog.pg_extension WHERE extname = $1 to execute attacker-controlled functions as the postgres superuser. The same trust issue affected direct sql.Open("pgx", ...) callsites and the public.user_search SECURITY DEFINER function, enabling PostgreSQL superuser access, operating system command execution through COPY ... FROM PROGRAM, and access to the pod ServiceAccount token. This issue is fixed in versions 1.28.4, 1.29.2, and 1.30.0.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
不可信的搜索路径
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
cloudnative-pg cloudnative-pg < 1.28.4 -

II. Public POCs for CVE-2026-55769

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10676 chars
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III. Intelligence Information for CVE-2026-55769

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Patches & Fixes for CVE-2026-55769 (2)

Vendor Advisories for CVE-2026-55769 (1)

Vendor Pages for CVE-2026-55769 (2)

IV. Related Vulnerabilities

Same product: cloudnative-pg
Same vendor: cloudnative-pg
Same weakness: CWE-426

V. Comments for CVE-2026-55769

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