CVE-2026-80348 — TarsWeb enforces its per-application roles by calling AuthService from individual…¶
Key facts
CVE-2026-80348 is a High (8.8) vulnerability: TarsWeb enforces its per-application roles by calling AuthService from individual…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-80348 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-80348/ |
Details¶
English | 한국어
Description¶
TarsWeb enforces its per-application roles by calling AuthService from individual controller methods, and four methods in app/controller/patch/PatchController.js make no such call. uploadAndPublish accepts a package upload and then builds and dispatches a deployment task to every server matching the supplied application and module name, while its sibling uploadPatchPackage, which only stores the package, does check developer authorization first. The only precondition uploadAndPublish enforces is that the named server is registered, and any registered server in the installation satisfies it. downloadPackage and deletePatchPackage select a package by an unscoped sequential primary key covering every application's uploads, and setPatchPackageDefault changes which package a given application deploys by default. Any authenticated account, including one holding a role scoped to a single unrelated application, can therefore push a package to and trigger its deployment on any server the console manages, retrieve or delete any other application's package, and change which package is deployed by default.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-80348 |
| 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-2026-80348/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-2026-80348
# 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/TarsCloud/TarsWeb
- https://github.com/TarsCloud/TarsWeb/blob/v3.0.16/app/controller/patch/PatchController.js
- https://github.com/TarsCloud/TarsWeb/issues/213
- https://www.vulncheck.com/advisories/tarsweb-through-3.0.16-missing-authorization-on-patch-deploy-download-and-delete-endpoints
Generated by PoC Generator on 2026-08-30T22:48:43.766629374
Frequently asked questions¶
What is CVE-2026-80348?¶
CVE-2026-80348 is a High (8.8) vulnerability: TarsWeb enforces its per-application roles by calling AuthService from individual…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-80348?¶
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-2026-80348?¶
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.