Openai threat report

Cisco published research on May 27, 2026 evaluating 15 frontier AI models from OpenAI, Anthropic, Google, Amazon, and xAI, concluding that all tested models are materially more susceptible to multi-turn prompt attacks than vendors publicly claim. Multi-turn attack success rates against tested models ranged from 8% to 88%, compared to 2% to 65% for single-turn attacks, and every model exhibited non-trivial multi-turn attack success rates. The researchers found a correlation between AI developers' emphasis on capability benchmarks over safety and larger gaps between single-turn and multi-turn vulnerability. OpenAI models were explicitly included in the evaluated cohort. The report does not identify a specific CVE but challenges the safety assurances underpinning enterprise deployments of these models, particularly in agentic and multi-step workflow contexts.

• Leading AI models are more vulnerable to malicious prompts than (opens in a new tab)