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OpenAI Codex CLI Credentials Hijacked via Malicious Package

OpenAI Codex CLI Credentials Hijacked via Malicious Package

ATLAS OWASP MEDIUM Moderate risk · Monitor closely ▲ 6.5 Simon Willison

A new Python package, llm-openai-via-codex 0.1a0, explicitly 'hijacks' Codex CLI credentials to route API calls through an unofficial OpenAI endpoint, bypassing standard API billing and access controls. This represents a credential misuse pattern that could expose organisations to unauthorised API access and quota theft. The technique exploits an undocumented or semi-official API surface, raising supply chain and access control concerns for enterprise OpenAI deployments.

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