New Archestra's OpenAPPA Saturates Two Major Security Benchmarks with a 0% Attack Success Rate

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Posted on Sun Oct 4 2026 | 5:11 am

Archestra released OpenAPPA, an open-source security engine designed to stop data exfiltration caused by prompt injection or model hallucination. The team reports zero successful attacks when running security benchmarks Bench-Corp (20 multi-step enterprise workflows) and AgentThreatBench, versus 10% for Claude Code’s auto mode and 31% for Microsoft FIDES.

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