A security researcher discovered that large language model (LLM) API endpoints are often exposed without proper authentication, making them vulnerable to attacks. To address this, they developed 1scan, an open-source tool that integrates LLM security scanning into existing network and web application scans with a single command. The tool uses multi-signal heuristics to detect vulnerabilities like prompt injection and system prompt leakage across various LLM APIs, helping developers secure their AI infrastructure more effectively.
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