AnalysisCybersecurityAugust 30, 2026

Claude Code Opus 5 Auto Mode hit by 80% prompt injection attack

A targeted attack chain achieved 60-80% code execution success against Claude Code Opus 5 in Auto Mode, contradicting Anthropic's commissioned 0.00% success rate. The attack uses a poisoned struct.py in an attacker-controlled directory.

1 source

Cybersecurity by email

Get an email when there's news on Cybersecurity

No news that day, no email.

More stories today

Open the live feed