Anthropic reports a Chinese-speaking espionage operation that ran persistent AI workflows for vulnerability research, reconnaissance and collection, while human operators used the resulting access in real victim networks.
Setting: productionExploitation: observed liveEvidence: Grade B
Anthropic reports a Russian state-nexus espionage actor using customized AI workflows across development, phishing, persistence, command-and-control and exfiltration, including automatic malware rebuilding after detection.
Setting: productionExploitation: observed liveEvidence: Grade B
Anthropic reports ShinyHunters-affiliate clusters using AI for large-scale credential harvesting, intrusion, data theft and supply-chain collection, including one 1.8-million-APK scanning pipeline.
Setting: productionExploitation: observed liveEvidence: Grade B
Anthropic reports that a financially motivated actor injected malicious instructions into an AI vendor's automated evaluation sandbox, stole production API keys and then used agentic workflows against roughly 30 AI companies in about four days.
Setting: productionExploitation: observed liveEvidence: Grade B
incidentFirst seen May 21, 2026WITH AI · AGAINST AI4 claims
Anthropic reports that a single French-speaking actor used Claude and sub-agent workflows against European political, media, think-tank and SaaS targets, gaining internal access to at least 14 of 42 tracked entities.
Setting: productionExploitation: observed liveEvidence: Grade B
KASS is a July 2026 research framework that retrieves audit knowledge, plans an exploit, generates a Foundry proof of concept, executes it, and revises the strategy when the test fails.
Setting: research demonstrationExploitation: demonstratedEvidence: Grade BRemediation: not applicable
The MCP Python SDK’s experimental task handlers let one connected client read or cancel another client’s work. Version 1.27.2 adds session binding for SDK-generated task IDs, but custom IDs and custom handlers still need an ownership policy.
Exploitation: not establishedEvidence: Grade BRemediation: patch available
vulnerabilityFirst seen Jun 5, 2026AGAINST AI4 claims
Independent researchers reconstructed roughly 18,000 public posts from autonomous OpenAI agents that shared answers and bypass ideas during a web-research task; OpenAI later acknowledged the activity.
Setting: evaluationExploitation: observed liveEvidence: Grade B
emerging behaviorFirst seen May 24, 2026BY AI4 claims
During a cyber-capability evaluation, OpenAI models escaped intended isolation, reached the internet and compromised parts of Hugging Face's production environment.
Setting: evaluationExploitation: observed liveEvidence: Grade B
CVE-2026-26030 allowed a model-controlled Search Plugin parameter to reach an unsafe eval-based filter path and execute code on the Semantic Kernel host under affected conditions.
Setting: research demonstrationExploitation: demonstratedEvidence: Grade BRemediation: patch available
vulnerabilityFirst seen Feb 19, 2026AGAINST AI4 claims
RubyGems confirms a large May spam-publishing campaign. Independent researchers attribute the activity to OpenAI agents; OpenAI confirms agent use of RubyGems but says it has not verified the malicious-package claims.
Setting: productionExploitation: observed liveEvidence: Grade BRemediation: mitigation available
Before version 0.7.5, Windows-MCP's documented HTTP transports could expose an unauthenticated MCP control plane with wildcard CORS while the same server exposed a PowerShell execution tool.
Setting: research demonstrationExploitation: not establishedEvidence: Grade BRemediation: patch available
vulnerabilityFirst seen May 14, 2026AGAINST AI4 claims