CVE-2026-50152 — Ceph is an open-source distributed storage platform providing object, block, and file…¶
Key facts
CVE-2026-50152 is a Critical (9.1) vulnerability: Ceph is an open-source distributed storage platform providing object, block, and file…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-50152 |
| Severity | Critical (9.1) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-50152/ |
Details¶
English | 한국어
Description¶
Ceph is an open-source distributed storage platform providing object, block, and file storage. In versions prior to 20.2.4 and 19.2.6, the Monitor subscription handler fails to properly authorize access to the configuration-key store, allowing any CephX user with only mon allow r capabilities to read the entire store by sending a single crafted MMonSubscribe message. The config-key store holds sensitive secrets including OSD LUKS disk-encryption passphrases and, on cephadm-managed clusters, the SSH private key that cephadm uses to reach every host in the cluster. Because that key grants root on every node under the default cephadm configuration, a low-privileged read-only account can escalate to full cluster and host compromise. This issue is fixed in versions 20.2.4 and 19.2.6
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-50152 |
| Type | RCE |
| CVSS Score | 9.1 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-50152/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-2026-50152
# 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/ceph/ceph/commit/d971bb2b6199f70b1708a20a63fa944ee7a94727
- https://github.com/ceph/ceph/commit/f2840d2fd338ab5de2865f0f78684bbf7b888c84
- https://github.com/ceph/ceph/security/advisories/GHSA-rg9p-5xcp-wm8h
Generated by PoC Generator on 2026-08-30T08:00:07.602097434
Frequently asked questions¶
What is CVE-2026-50152?¶
CVE-2026-50152 is a Critical (9.1) vulnerability: Ceph is an open-source distributed storage platform providing object, block, and file…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-50152?¶
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-2026-50152?¶
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.