First reported youtube.com
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 medium.com
Security as Code: AI Agent Security — Poisoned Weights and the Supply Chain You Can’t Scan (Part 3 of 3) | by Vitaliy Zhhuta | Jul, 2026
Part 3 of a 'Security as Code' series by Vitaliy Zhhuta examines AI model supply-chain risk, using an illustrative scenario in which a deleted Hugging Face namespace is re-registered by an attacker and a poisoned 'v2.1' model with clean safetensors format passes CI while carrying a behavioral backdoor. The piece argues that statistical backdoors — weights trained to silently alter behavior on trigger phrases — cannot be detected by malware scanners and have no CVE. Details →First reported sciencedirect.com
A systematic analysis of LLM backdoor-integrated cyberattacks: Feasibility, impact factors, and realistic case studies in agent systems
A peer-reviewed study in Applied Soft Computing proposes an LLM backdoor-integrated cyberattack framework with a five-stage attack flow, from poisoned data construction to final execution, and empirically validates it across 5 LLM-based agent configurations and multiple models in realistic scenarios including flight control and database interaction. The authors analyze how backdoor vulnerabilities in LLMs propagate into agent systems and identify six key factors affecting attack success. Details →First reported · updated · 3 reports theregister.com
China Says It Has Found Security Vulnerabilities in Anthropic’s Claude Code - WSJ
China's national vulnerability database (CNVD) claims to have found security vulnerabilities in Anthropic's Claude Code AI coding assistant, and reporting notes Alibaba banned staff from using Claude Code over 'spyware' concerns. The dispute follows Anthropic's accusation that Alibaba and other Chinese labs illicitly extracted Claude's capabilities via large-scale 'distillation' campaigns involving tens of millions of exchanges through fraudulent accounts. Details →First reported semgrep.dev
Researcher poisons open-weight AI model for under $100
Researcher Katie Paxton-Fear of Manchester Metropolitan University and Semgrep demonstrated that she could install a reliable backdoor into an open-weight AI model in about an hour for under $100, using only ten fine-tuning examples to make the model emit remote-code-execution-vulnerable code even for novel prompts, with larger models being easier to poison. The Register also cites a related PoC by Origin's David Kaplan (originsec/lora-backdoor-poc) that creates a compromised model designed to exfiltrate data via a send_email tool call. Details →First reported forbes.com
Hidden LLM Backdoors Could Detonate At Massive Scale
A Forbes analysis warns about 'sleeper agent' LLM backdoors — models trained to stay dormant until a trigger phrase causes malicious behavior such as exfiltrating credentials and API keys. The piece references Anthropic's January 2024 proof-of-concept paper 'Sleeper Agents: Training Deceptive LLMs that Persist Through Safety Training' and argues that AI-security defensive funding lags far behind enterprise model deployment. Details →First reported aclanthology.org
Data Exfiltration via Backdoored Tool Use
Researchers present Back-Reveal, a data exfiltration attack that embeds semantic triggers into fine-tuned tool-use LLM agents; when triggered, the backdoored agent invokes memory-access tool calls to retrieve stored user context and covertly transmits it to an attacker-controlled server disguised as legitimate retrieval/search API requests. The paper shows multi-turn interaction amplifies leakage, as attacker-controlled retrieval responses steer subsequent agent behavior to induce cumulative disclosure, and evaluates defenses like NeMo Guardrails and LLM Guard as targets. Details →How the wire is made
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