--- title: "Prompt injection breaks today’s AI agents, study warns" url: https://daily.dev/posts/prompt-injection-breaks-today-s-ai-agents-study-warns-2hfyd6ptc source_url: https://www.csoonline.com/article/4184455/prompt-injection-breaks-todays-ai-agents-study-warns.html type: article source: "CSO Online" published: 2026-06-12T10:03:37.585Z updated: 2026-06-12T10:04:02.670Z tags: ["ai-agents", "prompt-injection"] reading_time: 5 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Prompt injection breaks today’s AI agents, study warns **[CSO Online](https://daily.dev/sources/csoonline)** · 5 min read · 0 upvotes · 0 comments ## Summary A new benchmark called StakeBench reveals that current AI web agents powered by GPT-5 and Gemini have no reliable defenses against prompt injection attacks. Across 3,168 adversarial runs, indirect prompt injection achieved success rates of 41–68% and direct injection exceeded 79%. Critically, no tested configuration achieved 'Robust Behavior,' meaning every attack scenario exposed at least one failure mode. The research introduces a stakeholder-centric framework distinguishing harm to end users, third-party sellers, and platforms, showing each group faces distinct risks. Notably, some attacks succeed while users see nothing wrong ('stealthy parasitism'). The study also found that resilience depends on both the underlying model and agent architecture, and preliminary experiments suggest visual content may be an emerging attack vector. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [The Prompt Injection Peril and Why AI Agents Are Your Network’s Newest Vulnerability](https://daily.dev/posts/the-prompt-injection-peril-and-why-ai-agents-are-your-network-s-newest-vulnerability-vu0delvbu) · Security Boulevard · 1 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#prompt-injection](https://daily.dev/tags/prompt-injection) [View this post on daily.dev](https://daily.dev/posts/prompt-injection-breaks-today-s-ai-agents-study-warns-2hfyd6ptc)