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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-xrxf-jgv3-qmrm OpenAI Codex CLI enables code execution through malicious MCP (Model Context Protocol) configuration files
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 17 Apr 2026 09:15:00 +0000

Type Values Removed Values Added
Title OpenAI Codex CLI Arbitrary Command Execution via Malicious Configuration Files
Weaknesses CWE-78

Thu, 16 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 14 Apr 2026 16:45:00 +0000

Type Values Removed Values Added
Title OpenAI Codex CLI Arbitrary Command Execution via Malicious Configuration Files
Weaknesses CWE-78
CWE-94

Tue, 14 Apr 2026 16:30:00 +0000

Type Values Removed Values Added
First Time appeared Openai
Openai codex
Vendors & Products Openai
Openai codex

Tue, 14 Apr 2026 14:30:00 +0000

Type Values Removed Values Added
Description 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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-04-16T12:06:45.207Z

Reserved: 2025-09-26T00:00:00.000Z

Link: CVE-2025-61260

cve-icon Vulnrichment

Updated: 2026-04-16T11:30:46.241Z

cve-icon NVD

Status : Received

Published: 2026-04-14T15:16:24.487

Modified: 2026-04-16T13:16:45.767

Link: CVE-2025-61260

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-04-17T09:00:10Z

Weaknesses