CVE-2026-58474 — whichllm before 0.5.16 contains a code injection vulnerability in the run and snippet…¶
Key facts
CVE-2026-58474 is a High (8.8) vulnerability: whichllm before 0.5.16 contains a code injection vulnerability in the run and snippet…. This entry ships a detection-only PoC and a Docker test lab.
| CVE | CVE-2026-58474 |
| Severity | High (8.8) |
| Detection / prevention | — |
| PoC | poc.py |
| Source | 2026/CVE-2026-58474/ |
Details¶
English | 한국어
Description¶
whichllm before 0.5.16 contains a code injection vulnerability in the run and snippet commands that allows a remote attacker who controls a HuggingFace repository to achieve arbitrary code execution by crafting a malicious GGUF filename containing double quotes or other special characters. The script generation function in cli.py interpolates HuggingFace-derived values, including GGUF variant filenames from the Hub API siblings rfilename field, directly into Python source code without escaping, allowing the crafted filename to break out of the generated string literal and execute injected code on the user's machine before any model download occurs.
Vulnerability Details¶
| Property | Value |
|---|---|
| CVE ID | CVE-2026-58474 |
| 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-2026-58474/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-2026-58474
# 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/Andyyyy64/whichllm/commit/77e8dc9e8b45212c694d631d758623e17a00859e
- https://github.com/Andyyyy64/whichllm/pull/147
- https://github.com/Andyyyy64/whichllm/releases/tag/v0.5.16
- https://www.vulncheck.com/advisories/whichllm-code-injection-via-run-and-snippet-commands
Generated by PoC Generator on 2026-08-30T18:26:52.890966507
Frequently asked questions¶
What is CVE-2026-58474?¶
CVE-2026-58474 is a High (8.8) vulnerability: whichllm before 0.5.16 contains a code injection vulnerability in the run and snippet…. This entry ships a detection-only PoC and a Docker test lab.
How do I detect CVE-2026-58474?¶
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-2026-58474?¶
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.