I built a benchmark for multi-turn prompt injection attacks. Most defenses never see them coming.

Reddit r/artificial / 6/20/2026

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Key Points

The author notes that most prompt-injection benchmarks are one-shot, while real attacks often unfold over multiple turns with escalating influence.
They built a benchmark focused on multi-turn escalation and cross-source authority transfer to better reflect how such attacks can bypass defenses.
A key challenge identified is correctly attributing and transferring trust across different sources over time, which many defenses may not handle well.
The benchmark, proxy, and a live red-team environment were open-sourced to let others reproduce results and test potential bypasses.
The author invites the community to attempt breaking the system and contribute any discovered bypasses back into the benchmark.

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Reddit r/artificial