CVE-2026-73612 — File Browser before v2.63.22 fails to validate access rules for descendants during…¶
Key facts
CVE-2026-73612 is a High (8.1) vulnerability: File Browser before v2.63.22 fails to validate access rules for descendants during…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-73612 |
| Severity | High (8.1) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-73612/ |
Details¶
English | 한국어
Description¶
File Browser before v2.63.22 fails to validate access rules for descendants during recursive copy, rename, and delete operations, allowing authenticated users to bypass path-based access controls. Attackers can copy, rename, or delete denied files by operating on their allowed parent directory, defeating rule-based isolation for confidentiality and integrity.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-73612 |
| Type | IDOR |
| CVSS Score | 8.1 |
Proof of Concept¶
Download¶
# Download PoC script
curl -O https://raw.githubusercontent.com/fankh/vulnerability-poc/main/2026/CVE-2026-73612/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-2026-73612
# 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/filebrowser/filebrowser/commit/72faf6dd3c85628e332d3e567124b86708ce2695
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5485
- https://www.vulncheck.com/advisories/file-browser-before-authorization-bypass-via-recursive-operations
- https://github.com/filebrowser/filebrowser/security/advisories/GHSA-77x8-73f4-5485
Generated by PoC Generator on 2026-08-17T01:18:41.534676973
Frequently asked questions¶
What is CVE-2026-73612?¶
CVE-2026-73612 is a High (8.1) vulnerability: File Browser before v2.63.22 fails to validate access rules for descendants during…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-73612?¶
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-2026-73612?¶
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.