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TechRadar
Sead Fadilpašić

'This is not a traditional coding error': Experts flag potentially critical security issues at the heart of Anthropic's MCP, exposes 150 million downloads and thousands of servers to complete takeover

Anthropic Ox
The Anthropic logo displayed on a screen with the flag of the United States in the background.
  • Ox researchers warn Anthropic’s Model Context Protocol has systemic RCE flaw
  • Vulnerability baked into MCP SDKs across Python, TypeScript, Java, Rust
  • 200,000+ instances exposed; Anthropic says behavior is “expected”

Security researchers Ox have claimed Anthropic’s Model Context Protocol (MCP) contains a “critical, systemic vulnerability” which puts hundreds of thousands of instances at risk of remote code execution (RCE).

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