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techMEDIUM2026-05-04 19:00 UTC

Prompt Injection: 5 Ways to Bypass a Regex Blocklist on an LLM

A walkthrough of prompt injection attacks against OopsSec Store's AI assistant, bypassing its input filters to extract a flag from the system prompt. OopsSec Store has an AI support assistant with a secret embedded in its system prompt. The only thing standing between us and the flag is a regex bloc

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