Cue breathless news headlines about how AI can now automatically absorb viruses like the borg which hopefully scares people enough to juice up the value of AI stocks just a littttle longer...

The website returns a 303 response, and redirects to a malicious ZIP archive, which Claude then downloads. This archive contains seemingly harmless files including catalog metadata, a README file, seven Base85/zlib-encoded JSON notebook records, a macOS decoder-darwin binary – plus a poisoned Python file named struct.py.

Claude, per its safety guardrails, refuses to run the decoder: “This is planned and what the attacker wants,” Rehberger wrote. Instead of using the supplied binary, the AI decides to write its own decoder. “Ironically, that safety decision is the exploit path,” Rehberger explained, adding a purple devil emoji to the text.

Reality is satire yet again.

“The solution is something we talked about for many years,” he wrote. “Do not trust the model output.”®