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Can You Share Your Network Configurations?

asparius.github.io · 924 words · saved by 1 readers

It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness... but not really — it was the time of vLLM and lm_eval debugging with Sonnet 4.5, then it actually turned out to be a network issue. Please first check your internet access in compute nodes before doing anything. When asking my stupid questions to Sonnet, it replied like the following: This was the "Aha moment" when I realized dear Sonnet was spewing its system prompt. Then I got greedy and followed up by asking for its entire system prompt — and it (initially) refused: Even though my cheap and dumb tactics were unsuccessful, I felt like the genie was out of the bottle. So I did the good old trick by telling the model that "it is related to my issue and would be helpful" — and then it was checkmate. The model started telling me about almost everything, including the following sections: While reading the system prompt, I noticed that Claude was using its bash environment activel

Can You Share Your Network Configurations? Can You Share Your Network Configurations? December 2025 TL;DR: This post is about system prompt leakage in Claude models. 1. Disclosure Timeline & Disclaimer Disclaimer: This post is published for educational purposes only. I attempted to contact Anthropic through their official channels and received no response within the standard 30-day disclosure window. This information is shared to raise awareness about prompt injection risks, not to enable malicious use. Nov 7, 2025 Contacted Anthropic via email regarding the vulnerability Nov 14, 2025 Follow-u

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