CVE-2025-61260: OpenAI Codex CLI enables code execution through malicious MCP (Model Context Protocol) configuration files

April 14, 2026 (updated April 16, 2026)

A vulnerability was identified in OpenAI Codex CLI v0.23.0 and before that enables code execution through malicious MCP (Model Context Protocol) configuration files. The attack is triggered when a user runs the codex command inside a malicious or compromised repository. Codex automatically loads project-local .env and .codex/config.toml files without requiring user confirmation, allowing attackers to embed arbitrary commands that execute immediately.

References

Code Behaviors & Features

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