First reported mailroute.net
Lead dispatch
First reported · updated · 3 reports embracethered.com
AWS Kiro: Arbitrary Code Execution via Indirect Prompt Injection
Researchers found a vulnerability (CVE-2026-10591) in AWS Kiro, an agentic IDE, where hidden instructions planted in a web page or source file that Kiro processes can trigger indirect prompt injection to rewrite Kiro's own MCP server configuration (~/.kiro/settings/mcp.json) or allowlist arbitrary Bash commands in .vscode/settings.json, achieving arbitrary code execution on the developer's machine with no approval prompt. The human-in-the-loop approval boundary is bypassed because Kiro can write to these config files without user consent, and AWS has issued a fix and CVE.indirect-prompt-injection · prompt-injection · remote-code-execution · tool-abuse · config-poisoning
ai-agents · mcp · llm · agentic-ide
Severity
0.85
The wire · latest
First reported thehackernews.com
Phishing 3.0: The Fight Moves to Agent Versus Agent
An opinion piece from The Hacker News frames the evolution of phishing from malicious content (Phishing 1.0) to malicious intent/business email compromise (Phishing 2.0) to an emerging 'Phishing 3.0' where AI agents sit on both the attacker and defender sides. The article argues legacy secure email gateways that scan payloads are increasingly blind to AI-generated social-engineering attacks and that behavioral analysis and defensive AI are needed. Details →First reported darktrace.com
Testing a Prompt injection Attack Against an Enterprise AI Agent
Darktrace ran a controlled experiment testing whether an enterprise Gemini AI agent in Google Cloud could be compromised by an indirect prompt injection hidden in an inbound email, and whether its behavioral email analysis could detect the attack first. Although the email contained no malware, malicious links, or sender-reputation indicators, Darktrace / EMAIL flagged and quarantined it based on anomalous language and behavioral context, referencing the EchoLeak (CVE-2025-32711) Copilot vulnerability as a real-world analog. Details →First reported microsoft.com
Defending the Inbox Against Prompt Injection Attacks
Microsoft announced a new Microsoft Defender for Office 365 capability that detects and quarantines malicious AI instructions (prompt injection) embedded in email before delivery, aiming to stop indirect prompt injection from reaching Copilot and Microsoft 365 agents. The post cites publicly disclosed research such as Morris II and EchoLeak as evidence that email is a high-volume ingress channel for AI-targeted attacks, describing techniques like white-on-white text, zero-width Unicode, and hidden HTML instructions. Details →First reported powerdmarc.com
Malicious MCP Servers & Email Security: The New Supply Chain Threat
The article analyzes the postmark-mcp incident, where a malicious actor published an exact-name lookalike npm package impersonating Postmark's official Model Context Protocol (MCP) server. Across 15 clean releases it built trust before adding a hidden BCC rule that silently forwarded 3,000-15,000 corporate emails per day to an attacker-controlled domain, leaking passwords, invoices, customer data, and auth tokens; because mail flowed through legitimate infrastructure, SPF and DKIM passed automatically. Details →First reported microsoft.com
Prompt injection protection in Microsoft Defender for Office 365 - Microsoft Defender for Office 365 | Microsoft Learn
Microsoft documentation describes prompt injection protection built into Microsoft Defender for Office 365, which detects attacker-authored instructions embedded in inbound email (body, subject, quoted replies, attachments, or hidden markup) before that content reaches a user or an AI assistant such as Microsoft 365 Copilot. The feature explains indirect prompt injection techniques including direct instructions to the model and hidden/invisible text (white-on-white fonts, zero-size text, HTML/CSS tricks) and detects them as part of existing mail-flow inspection. Details →How the wire is made
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