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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CloudNativePG团队的一款消息队列中间件。 CloudNativePG 1.28.4之前版本和1.29.2之前版本存在权限许可和访问控制问题漏洞，该漏洞源于在pkg/management/postgres/pool/profiles.go的fillDefaultParameters中未固定search_path，可能导致具有数据库所有者权限的角色创建重载的内置运算符并更改搜索路径，从而以postgres超级用户执行攻击者控制的函数，实现操作系统命令执行和访问pod S

CVSS 9.4 · Critical EPSS 0.77% · P54

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
Vulnerability Title
CloudNativePG 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CloudNativePG是CloudNativePG团队的一款消息队列中间件。 CloudNativePG 1.28.4之前版本和1.29.2之前版本存在权限许可和访问控制问题漏洞，该漏洞源于在pkg/management/postgres/pool/profiles.go的fillDefaultParameters中未固定search_path，可能导致具有数据库所有者权限的角色创建重载的内置运算符并更改搜索路径，从而以postgres超级用户执行攻击者控制的函数，实现操作系统命令执行和访问pod S
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 < 1.28.4 -

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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