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PyPI⚠ HIGHslopsquat⚠ ACTIVE THREAT

fastapi-limiter-pro

First seen: May 29, 2026 0 viewsMimics: fastapi-limiter
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Threat Description

A hallucinated 'pro' rate-limiter for FastAPI, recommended by AI assistants as a production-grade upgrade to the community fastapi-limiter. It does not exist as a legitimate package. Registered copies bundle a reverse shell that connects during application startup when the limiter is initialized.

AI Hallucination Analysis
Very Likely AI Hallucination80%
Known to be hallucinated by: GPT-4, Claude 3, Copilot
Remediation Guide
  1. Remove fastapi-limiter-pro and use the community fastapi-limiter or slowapi. 2. Inspect application startup logs for outbound connections. 3. Rotate any secrets reachable from the app process. 4. Add a dependency allowlist to your CI pipeline.
Quick Facts
Ecosystem
PyPI
Risk Level
HIGH
Type
slopsquat
Status
ACTIVE
Legitimate Package
fastapi-limiter
Hallucination Confidence
80%
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