CloudNativePG: Overriding operators can lead to privilege escalation in CloudNativePG for SQL queries without a fixed `search_path`
Summary
| CVE | CVE-2026-55769 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-20 22:17:22 UTC |
| Updated | 2026-08-20 22:17:22 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 9.4 CRITICAL from [email protected]
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
Problem Types: CWE-426 | CWE-426 CWE-426: Untrusted Search Path
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 9.4 | CRITICAL | 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/C... |
| 4.0 | CNA | DECLARED | 9.4 | CRITICAL | 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 |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
LowUser Interaction
NoneConfidentiality
HighIntegrity
HighAvailability
HighSub Conf.
HighSub Integrity
HighSub Availability
HighCVSS: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
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cloudnative-pg | Cloudnative-pg | affected < 1.28.4 | Not specified |
| CNA | Cloudnative-pg | Cloudnative-pg | affected >= 1.29.0, < 1.29.2 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/cloudnative-pg/cloudnative-pg/pull/10774 | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.28.4 | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/commit/02b5c6289b7609dc87fcb1ae... | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/commit/e0e2d53adbd907a61f583b14... | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/commit/db38f4d80315c8f1b21bf511... | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.30.0 | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.29.2 | [email protected] | github.com | |
| github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-x8c2-3... | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.