CVE-2025-61260: OpenAI Codex CLI enables code execution through malicious MCP (Model Context Protocol) configuration files
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.
Published Apr 14, 2026 · Updated Apr 16, 2026
Affected packages
@openai/codex
- Ecosystem
- npm
- Affected
- <= 0.23.0
- Fixed in
- No patched version yet
- Check
npm ls @openai/codex
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
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
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology