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Trail of Bits Ships Coop: Isolated VMs for Claude Code and Codex

Trail of Bits Ships Coop: Isolated VMs for Claude Code and Codex

FIRST LOOK ATLAS OWASP LOW Limited impact · Standard review ▲ 7.2 Anthropic (via HN)

Trail of Bits has released Coop, an open-source Rust CLI that provisions disposable, isolated virtual machines for running Claude Code and OpenAI Codex with full tool access — including Docker, git, compilers, and package managers — without exposing the host system. This directly closes the containment gap that has made agentic AI coding assistants a liability in developer environments, giving security teams a reproducible boundary between autonomous AI tool execution and production infrastructure. What remains unaddressed is broader multi-provider coverage, enterprise policy enforcement, and centralised audit logging maturity needed before this is ready for regulated-environment deployment at scale.

Claude Sandbox Escape Enables Credential Exfiltration

Claude Sandbox Escape Enables Credential Exfiltration

ATLAS OWASP MEDIUM Moderate risk · Monitor closely ▲ 7.2 Simon Willison

Anthropic has published detailed documentation of its sandboxing architecture across Claude.ai, Claude Code, and Claude Cowork, including disclosure of a previously identified credential exfiltration vector via the api.anthropic.com/v1/files endpoint. The writeup covers process-level isolation technologies including gVisor, Seatbelt, Bubblewrap, and full VM approaches, and candidly acknowledges security gaps that were missed. This transparency is notable for the agentic AI space, where sandbox documentation is typically sparse and trust is difficult to calibrate.

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