Secure Your Python LLM Pipeline with Resk-LLM — 11 Threat Detectors in One pip Install

#python #llm #security #opensource

Links

GitHub: github.com/Resk-Security/Resk-LLM
PyPI: pypi.org/project/resk-llm
Web: resk.fr

Prompt injection and jailbreak attacks are the most common LLM security threats today. Most defenses are either too slow for real-time use or locked behind proprietary APIs.

Resk-LLM is an open source Python toolkit that brings 11 threat detectors into a single FastAPI middleware. Install it, decorate your endpoint, and get instant protection against prompt injection, jailbreak, PII leakage, code injection, exfiltration, and more.

Installation

pip install resk-llm

FastAPI Middleware Example

from fastapi import FastAPI
from resk_llm import RESKSecurityMiddleware

app = FastAPI()

# Attach threat detection to your LLM route
app.add_middleware(
    RESKSecurityMiddleware,
    detectors=["injection", "jailbreak", "pii", "exfiltration"],
    mode="block"  # or "log" for monitoring
)

@app.post("/chat")
async def chat(message: dict):
    # If we reach here, input passed all detectors
    response = await call_your_llm(message["content"])
    return {"response": response}

Available Detectors

Detector	What It Catches
Prompt Injection	DAN, ignore-prior-instructions, role-play escapes
Jailbreak	Hypothetical traps, obfuscated instructions
PII Leakage	Emails, phone numbers, SSNs, credit cards
Exfiltration	Prompt stealing, data dumping
Toxic Content	Hate speech, harassment, profanity
Code Injection	SQL, shell, Python eval attempts
URL Phishing	Malicious URL patterns
And 4 more	Hidden content, base64 encoding, etc.

Why Dual-Layer Defense?

Resk-LLM works on the input side, catching threats before they reach the model. For even stronger protection, pair it with resk-logits — a GPU-accelerated logits processor that blocks dangerous tokens at generation time. Combined, you get input filtering AND output sanitation in one pipeline.

Production Ready

MIT licensed, open source
Python 3.13+ and PyTorch 2.0+
Zero external API dependencies
Configurable per-route policies
Log mode for evaluation, block mode for production

pip install resk-llm

Try it on your next project. Open an issue if a detector misses something — this is community-driven security, and feedback makes it better.

DEV Community