GPT-5.5: mythos-like hacking, open to all

A vulnerability dubbed "Mythos" in GPT-5.5 model would allow attackers to bypass security mechanisms.

Published 12sem1 sourceImportant

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The fact

This flaw has broad scope and affects all users without particular authentication distinction.

OpenAI investigates the exact nature of this flaw and correction measures.

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Auto-synthesis from 1 media source · identified on April 23, 2026