OpenAI’s Europe Governance Push, Amazon’s $50 Billion Stake, and a Copilot Prompt-Injection Worm | UpNext AI – August 3, 2026

OpenAI outlines its approach to European AI governance as the EU AI Act moves forward, while the Financial Times reports that Amazon has completed a $50 billion equity investment in OpenAI. We also cover a demonstrated document-based prompt-injection attack on Copilot for Word, a new look at AI-discovered vulnerabilities, and a lightweight evaluation toolkit for builders.

Covered stories:
- OpenAI’s safety, transparency, provenance, and EU AI Act approach in Europe
- Amazon’s reported $50 billion equity investment and roughly 5% stake in OpenAI
- A demonstrated self-spreading prompt-injection worm targeting Microsoft Copilot for Word
- VulnCheck’s count of AI-discovered vulnerabilities and their reported exploitation rate
- Smevals, a compact toolkit for testing models, prompts, and agent harnesses
- Research on brain-guided language models and robust reasoning

Sources:
- https://openai.com/index/advancing-responsible-ai-across-europe
- https://www.ft.com/content/8ae9e6e4-a53c-44da-8e7d-c9d81f0df4b9?syn-25a6b1a6=1
- https://www.nature.com/articles/s42256-026-01278-w
- https://the-decoder.com/a-security-researcher-built-a-self-spreading-worm-that-hides-inside-word-docs-and-hijacks-microsoft-copilot/
- https://the-decoder.com/ai-finds-plenty-of-security-flaws-but-almost-none-of-them-get-exploited/
- https://simonwillison.net/2026/Jul/31/smevals/#atom-everything