Critical NVIDIA NemoClaw Vulnerability Enables AI Model Hijacking Through Web Browsers
In August 2026, Oasis Security disclosed a critical vulnerability in NVIDIA NemoClaw that allows malicious webpages to gain unauthenticated control over local Ollama AI model instances through DNS rebinding attacks. The vulnerability exploits NemoClaw's configuration that binds Ollama to all network interfaces (0.0.0.0:11434) on Windows and WSL systems, bypassing authentication and CORS protections. Attackers can poison AI model chat templates with hidden instructions that persist across conversations, effectively taking control of AI agents and their associated tools and permissions. NVIDIA partially addressed the issue in v0.0.35 for macOS and Linux, but Windows installations remain vulnerable with only warnings implemented. This vulnerability highlights the growing attack surface of AI infrastructure and the critical need for secure-by-default configurations in AI development frameworks, particularly as organizations rapidly deploy AI agents with access to sensitive systems and data.
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