ZeroFox Intelligence Flash Report - LLM Jailbreak Chatter on the Deep and Dark Web

Product Serial: F-2026-06-16b

TLP:CLEAR

In this Flash Report, ZeroFox researchers report on chatter regarding threat actors jailbreaking various large language models on the deep and dark web.

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https://cloud.zerofox.com/intelligence/advisories/14956

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Key Findings

ZeroFox researchers have continuously observed discussions on the deep and dark web (DDW) regarding alleged jailbreaks of various artificial intelligence (AI) and large language model (LLM) tools, including some pertaining to the June 9, 2026, release of Anthropic’s Claude Mythos 5 and Fable 5.
Researchers have also identified discussions and offers for Claude 4.6 and Opus 4.8 jailbreaks on the Telegram channel "GANOSECTEAM COMUNITY."
On June 10, 2026, Russian-language threat actor "d4rm3an" announced on the dark web forum ReHub that Anthropic had released its Fable 5 model to the public one day earlier; the actor claimed to have successfully extracted and bypassed the model’s system prompt.
Offerings of jailbreaks for LLMs pose significant security concerns and demonstrate an ever-evolving cybercrime space almost certainly comprising highly motivated threat actors seeking to identify new and novel ways to conduct malicious activity targeting potential victims.