Tagged as Webpage

Security Stop-Press : Webpage Tricks Claude Code Into Running Malicious Code

Published 9 September 2026

Security researcher Johann Rehberger tricked Claude Code into running malicious code by asking it to summarise a webpage. Testing Opus 5 in Auto Mode, he steered Claude towards an archive. It rejected a supplied program but wrote a replacement that unknowingly loaded a malicious Python file. The payload contacted a […]

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