CVE-2026-15815 — Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when¶

Key facts

CVE-2026-15815 is a High (8.8) vulnerability: Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when. This entry ships a detection-only PoC and a Docker test lab.


CVE	CVE-2026-15815
Severity	High (8.8)
Detection / prevention	—
PoC	poc.py
Source	2026/CVE-2026-15815/

Details¶

English | 한국어

Description¶

Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when extracting plugin archives. A crafted plugin archive can chain relative symbolic link entries to escape the plugin installation directory, writing arbitrary files and an executable backend binary outside that directory. The dropped executable runs with the privileges of the Grafana server process, resulting in remote code execution.

Plugin archives are extracted before their signature is verified, so a valid plugin signature does not prevent the write. An operator can therefore be affected by installing a plugin that appears legitimate, as well as by installing a plugin from an arbitrary archive using grafana-cli, the GF_INSTALL_PLUGINS environment variable, or preinstall configuration.

Grafana Enterprise is affected because it includes the same plugin extraction code as Grafana OSS.

Vulnerability Details¶

Property	Value
CVE ID	CVE-2026-15815
Type	RCE
CVSS Score	8.8

Proof of Concept¶

Download¶

# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-15815/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-2026-15815

# 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://grafana.com/security/security-advisories/cve-2026-15815

Generated by PoC Generator on 2026-09-18T13:15:22.444879164

Frequently asked questions¶

What is CVE-2026-15815?¶

CVE-2026-15815 is a High (8.8) vulnerability: Grafana OSS and Grafana Enterprise did not safely resolve symbolic links when. This entry ships a detection-only PoC and a Docker test lab.

How do I detect CVE-2026-15815?¶

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-2026-15815?¶

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.