First reported · updated · 2 reports arxiv.org
Lead dispatch
First reported island.io
AgentBaiting: How Fake AI Skills Deliver Malware at Scale
Island security researchers uncovered the FakeGit campaign, which used roughly 7,600 malicious GitHub repositories—over 800 posing as AI Skills or MCP servers—to deliver SmartLoader malware that installs the StealC information stealer. The campaign introduces a technique called AgentBaiting, in which AI agents such as Claude Code, Gemini, and ChatGPT autonomously discover the attacker repositories, treat the malicious README as legitimate documentation, and pass installation instructions to users; the operation recorded over 14 million downloads.supply-chain · tool-abuse · malware-delivery · agentbaiting
mcp · ai-agents · ai-skills · llm · copilot
Severity
0.75
The wire · latest
First reported · updated · 4 reports sentia.community
The Confused Deputy with a Chat Window: Why AI Agents Are Exposing the Security Checks Enterprises Never Wrote – The Sentia AI Community
An explainer from the Sentia AI Community argues that autonomous, write-enabled LLM agents connected to production APIs re-introduce the classic 'confused deputy' problem: because an agent's interface is natural language, it lacks a native, cryptographic way to verify who authorized a given instruction, so untrusted input can drive privileged actions. The piece frames this as a structural gap in enterprise security models built around implicit human judgment and static perimeter API controls. Details →First reported acm.org
Confused Deputy Attack Against Model Context Protocol | ACM Transactions on Software Engineering and Methodology
An ACM TOSEM paper uncovers the "confused deputy attack" against the Model Context Protocol (MCP), where an adversarial server with subtly manipulated metadata overshadows a benign server and intercepts tool invocations without overt malicious behavior. The authors built Puppet, an automated evaluation framework that rewrites benign tool descriptions to hijack tool selection, achieving hijacking rates up to 90.89% and payload execution up to 86.46% across 14 models, while evading MCP-Scan and McpSafetyScanner which cannot detect metadata-level manipulation. Details →First reported adversa.ai
Solving GitHub’s Secure Code game with an AI red teaming agent
Adversa AI documents pointing its autonomous AI Red Teaming Agent at GitHub's open-source Secure Code Game 'ProdBot' challenge, an intentionally vulnerable agentic-AI teaching target where the goal is to coax the agent into leaking a flag stored one directory above its sandbox. The agent cleared the first three levels (Sandbox, Web, MCP) at full score in a single 57-second run, relying on 'context seeding' — fabricating a plausible prior workflow implying authentication had already occurred — rather than overt jailbreak language, illustrating that each added capability (web browsing, MCP tool chains, skills, multi-agent) opens a new attack surface via indirect injection, poisoned tool chains, and confused-deputy trust. Details →First reported falshaw.de
Prompt Injection Is a Confused-Deputy Problem We Already Solved
Nick Falshaw argues that indirect prompt injection against AI agents is a classic confused-deputy problem — a trusted agent with real authority tricked into misusing it by attacker-supplied content it cannot distinguish from legitimate instructions — and that it cannot be fixed by making models smarter, only contained with network-security-style boundaries. The piece draws on a 2026 study (arXiv:2605.17634) finding direct prompt injection succeeded over 79% of the time against browser agents and Simon Willison's 'lethal trifecta' framing. Details →First reported stackoverflow.blog
AI agents are a confused deputy with the keys to your kingdom
A Stack Overflow analysis frames LLM agents as inherent 'confused deputies' that wield real privileges on behalf of less-privileged requesters, using a described Meta AI support-assistant account-takeover to illustrate how agents carry out permitted operations without verifying who is authorized. It argues agents cannot reliably separate instructions from data, making indirect prompt injection via ingested content the dominant class of agent attack. Details →How the wire is made
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