Skip to content

CVE-2026-55765 — CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes…

Key facts

CVE-2026-55765 is a High (8.5) vulnerability: CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes…. This entry ships a detection-only PoC and a Docker test lab.
CVE CVE-2026-55765
Severity High (8.5)
Detection / prevention —
PoC poc.py
Source 2026/CVE-2026-55765/

Details

English | 한국어

Description

CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.28.4 and 1.29.2, CloudNativePG embedded cleartext role passwords in ALTER ROLE and CREATE ROLE statements generated by SetUserPassword in pkg/management/postgres/utils/roles.go and appendPasswordOption in internal/management/controller/roles/postgres.go. When pg_stat_statements was preloaded with track_utility enabled and an untrusted tenant held pg_monitor or pg_read_all_stats, the tenant could recover platform-managed superuser or application-owner passwords, reconnect through enabled superuser TCP access, and execute operating system commands in the database pod with COPY ... FROM PROGRAM. Clusters using SCRAM-SHA-256 verifiers in managed-role Secrets were not affected. This issue is fixed in versions 1.28.4, 1.29.2, and 1.30.0.

Vulnerability Details

Property Value
CVE ID CVE-2026-55765
CVSS Score 8.5

Proof of Concept

Download

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-55765/poc.py

Usage

# Run PoC against target
python3 poc.py --target <TARGET_URL>

# With authentication
python3 poc.py --target <TARGET_URL> --username <USER> --password <PASS>

⚠️ Warning: This PoC is for authorized security testing only. It uses detection-only techniques and does not exploit or damage target systems.

Test Lab

This repository includes a Docker-based test environment with both vulnerable and patched applications.

Quick Start

# Clone and navigate to CVE directory
cd CVE-2026-55765

# Start both applications
docker-compose up -d

# Run tests
./run-tests.sh    # Linux/Mac
./run-tests.ps1   # Windows PowerShell

Application Endpoints

Application URL Status
Vulnerable App http://localhost:8080 Shows vulnerability
Patched App http://localhost:8081 Demonstrates fix

Directory Structure

├── README.md           # English documentation
├── README_KO.md        # Korean documentation
├── poc.py              # PoC detection script
├── docker-compose.yml  # Container orchestration
├── run-tests.sh        # Linux/Mac test runner
├── run-tests.ps1       # Windows test runner
├── vulnerable-app/     # Vulnerable version
│   ├── app.py
│   ├── Dockerfile
│   └── requirements.txt
└── patched-app/        # Fixed version
    ├── app.py
    ├── Dockerfile
    └── requirements.txt

References

  • https://github.com/cloudnative-pg/cloudnative-pg/commit/2f0342747e1f160425b9d51753c0069b0d6117d5
  • https://github.com/cloudnative-pg/cloudnative-pg/commit/3cd5af5d388c26758acf13c19ea806b4bcebb3fe
  • https://github.com/cloudnative-pg/cloudnative-pg/commit/9a13573dbe3d78721b7ea92141e6d2324a2c0ef0
  • https://github.com/cloudnative-pg/cloudnative-pg/pull/10724
  • https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.28.4
  • https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.29.2
  • https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.30.0
  • https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-w3gf-xc94-wvmj

Generated by PoC Generator on 2026-08-22T15:41:14.760998091

Frequently asked questions

What is CVE-2026-55765?

CVE-2026-55765 is a High (8.5) vulnerability: CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes…. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-55765?

Run the detection-only PoC included with this entry against your Docker test lab to confirm whether a target is affected; pair it with your own IDS logging.

How do I block or mitigate CVE-2026-55765?

Upgrade to a fixed version per the vendor advisory; the NVD record lists the affected versions. Use the included PoC to verify your remediation.

For authorized security testing and research only. See the full source and NVD record.