Microsoft patched a Copilot Studio prompt injection. The data exfiltrated anyway.

Microsoft assigned CVE-2026-21520 to a Copilot Studio prompt injection vulnerability and patched it in January — but in ...
SecurityWeek

Claude Code, Gemini CLI, GitHub Copilot Agents Vulnerable to Prompt Injection via Comments

Anthropic’s Claude Code Security Review, Google’s Gemini CLI Action, and GitHub Copilot Agent hacked via prompt injection ...

Agents hooked into GitHub can steal creds – but Anthropic, Google, and Microsoft haven't warned users

Exclusive: Researchers who found the flaws scored beer money bounties and warn the problem is probably pervasive ...
CSO Online

Copilot and Agentforce fall to form-based prompt injection tricks

Prompt injection flaws in Microsoft Copilot Studio and Salesforce Agentforce let attackers weaponize form inputs to override ...
The Next Web

Anthropic, Google, and Microsoft paid AI agent bug bounties, then kept quiet about the flaws

Researchers hijacked Claude, Gemini, and Copilot AI agents via prompt injection to steal API keys and tokens. All three ...
Visual Studio Magazine

Prompt Engineering? See VS Code Team's System Prompts for Copilot Chat, Now Open Source

"Now that the code is open source, what does it mean for you? Explore the codebase and learn how agent mode is implemented, what context is sent to LLMs, and how we engineer our prompts. Everything, ...
Microsoft

New and improved: Multi-agent orchestration, connected experiences, and faster prompt iteration

But in practice, prompt iteration has historically felt disjointed and slow. Makers previously balanced their flow of work ...